WO2015118573A1 - 回転作業装置 - Google Patents
回転作業装置 Download PDFInfo
- Publication number
- WO2015118573A1 WO2015118573A1 PCT/JP2014/000644 JP2014000644W WO2015118573A1 WO 2015118573 A1 WO2015118573 A1 WO 2015118573A1 JP 2014000644 W JP2014000644 W JP 2014000644W WO 2015118573 A1 WO2015118573 A1 WO 2015118573A1
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- WO
- WIPO (PCT)
- Prior art keywords
- electrode
- rotation
- rotating
- rotation center
- tip
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/3063—Electrode maintenance, e.g. cleaning, grinding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B5/00—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor
- B23B5/16—Turning-machines or devices specially adapted for particular work; Accessories specially adapted therefor for bevelling, chamfering, or deburring the ends of bars or tubes
- B23B5/166—Devices for working electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/10—Spot welding; Stitch welding
- B23K11/11—Spot welding
- B23K11/115—Spot welding by means of two electrodes placed opposite one another on both sides of the welded parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/3072—Devices for exchanging or removing electrodes or electrode tips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/30—Features relating to electrodes
- B23K11/31—Electrode holders and actuating devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/006—Vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/50—Other automobile vehicle parts, i.e. manufactured in assembly lines
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/51—Plural diverse manufacturing apparatus including means for metal shaping or assembling
- Y10T29/5168—Multiple-tool holder
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/3042—Means to remove scale or raised surface imperfection
- Y10T409/304256—Means to remove flash or burr
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T483/00—Tool changing
- Y10T483/11—Tool changing with safety means
- Y10T483/115—Guard
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T483/00—Tool changing
- Y10T483/17—Tool changing including machine tool or component
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T483/00—Tool changing
- Y10T483/18—Tool transfer to or from matrix
- Y10T483/1873—Indexing matrix
- Y10T483/1882—Rotary disc
Definitions
- the present invention relates to a rotary working apparatus that performs, for example, a cutting operation on an electrode tip surface or a removing operation for removing an electrode from a shank tip by a rotating operation with respect to an electrode for spot welding used in an automobile production line.
- spot welding has been used in which a copper electrode attached to the tip of a shank of a spot welding gun is pressed against a steel plate to pressurize it and energize to weld the steel plate with resistance.
- the cutting operation of the electrode tip surface and the removal operation of the electrode from the shank are generally performed by a rotary working device for spot welding.
- the rotary working device disclosed in Patent Document 1 includes an annular first rotating body in which a holding tool capable of holding an electrode is attached inward, and a plurality of tooth portions are formed at equal intervals on the outer periphery, An annular second rotating body in which a cutting cutter capable of cutting the tip end surface of the electrode is mounted inward, and a plurality of tooth portions are formed at equal intervals on the outer periphery, and one drive motor having a rotating shaft extending vertically It has.
- the first rotating body and the drive motor are connected by engaging a plurality of gears, and the second rotating body and the drive motor are also connected by engaging a plurality of gears. Then, when the drive motor is rotated while holding the electrode attached to the tip of the shank with a holding tool, the electrode is rotated around the electrode central axis together with the holding tool by the first rotating body to be removed from the tip of the shank. On the other hand, when the tip end surface of the electrode attached to the tip of the shank is brought into contact with the cutting cutter while the drive motor is driven to rotate, the cutting cutter is rotated around the electrode center axis by the second rotating body. The surface is to be cut.
- the present invention has been made in view of such points, and an object of the present invention is to provide a rotary work device that is highly versatile, compact, and low in cost.
- the present invention makes two rotating bodies have the same outer diameter (pitch circle diameter), and simultaneously rotates these two rotating bodies with one intermediate gear, It is characterized by controlling the rotational speed of both rotating bodies.
- the electrode removal work to remove from the tip of the shank is performed by rotating the holding tool around the electrode central axis while holding the electrode attached to the tip of the shank of the spot welding gun with the holding tool,
- a rotating device that performs an electrode cutting operation of cutting the electrode tip surface by bringing the cutting cutter into contact with the tip surface of the electrode mounted on the tip of the shank and rotating the cutting cutter around the electrode central axis.
- the clamping tool or the cutting cutter is mounted on the inside, and a plurality of teeth are formed in an annular shape on the outer periphery, so that the respective rotation centers are directed in the same direction.
- a storage unit for storing the rotational speed and a second rotational speed that is higher than the first rotational speed is provided, and when performing electrode removal work on at least one of the rotating bodies, the servo motor starts to be removed.
- a cutting start signal is output to the servo motor to perform the second rotation.
- a plurality of the electrodes before use can be stored on the radially outer side of the rotating body in a posture in which the electrode center axis is in the same direction as the rotation center of the rotating body.
- Electrode storage means is provided, and the extraction position of the electrode stored in the electrode storage means is located on a straight line connecting the rotation centers of the two rotating bodies.
- the third invention is characterized in that, in the first or second invention, the rotation shaft of the servo motor is provided in a posture extending in a direction intersecting with the rotation centers of the two rotating bodies.
- the rotation shaft of the servo motor is located above the rotating body.
- the holding tool includes an annular body that is rotatable in a state in which the center of rotation coincides with the rotational center of the rotating body, and the rotation of the annular body.
- a plurality of pressing members which are provided at equal intervals around the center and are pivotally supported to the rotation center side by a support shaft extending in the same direction as the rotation center.
- a plurality of recesses in which the protrusions are loosely fitted are provided on the peripheral surface of the rotating body so that the electrode center axis is aligned with the center of rotation between the pressing members.
- the rotating body In the set state, the rotating body is rotated to one side around the center of rotation, and the inner surface of each of the recesses pushes the protrusions to one side in the rotation direction by the relative rotating operation of the rotating body with respect to the holding tool.
- Each pressing member rotates to the rotation center side Sandwiching the electrode to press the serial electrode peripheral surface, the electrode by the rotation operation of the rotation center around one side of a further said rotary member is rotated together with the pincer, characterized in that removal from the shank tip.
- each work can be appropriately performed regardless of which rotary body is mounted with the holding tool and the cutting cutter. Therefore, for example, even when rotating work devices are arranged on the left and right of the production line in a symmetrical production line, the rotating work device is also symmetrical in the left-right direction only by reversing the rotating body on which the holding tool and the cutting cutter are mounted. Therefore, the cost is not increased.
- both rotary bodies can be equipped with a clamping tool or a cutting cutter, it is highly versatile.
- both rotating bodies are simultaneously rotated by one intermediate gear positioned between them, the number of gears can be reduced as compared with Patent Document 1, and a low-cost and compact device can be achieved.
- the cutting position, removal position, and mounting position of the electrode in the apparatus are located on a straight line, for example, the operation of a robot or an automatic machine that moves the electrode in the production line is simplified.
- the line tact can be shortened.
- the servo motor since the servo motor has a posture extending in a direction intersecting with the rotation center of the rotating body, the electrode is moved in the rotation center direction with respect to the rotating body when performing the electrode cutting operation or the removing operation. A part of a robot or an automatic machine approaching along the line becomes difficult to contact the device.
- the fourth invention when removing the electrode from the tip of the shank, even if cooling water dripped from the shank enters the inside of the apparatus, it becomes difficult to reach the inside of the servo motor. Therefore, it is possible to reliably prevent the servo motor from failing even if the electrode removal operation is repeated.
- the electrode to be removed can be clamped by utilizing the rotating operation of the rotating body in the electrode removing operation, a drive source other than a servo motor for rotating the rotating body is prepared separately to clamp the electrode. There is no need, the equipment is simple, and the apparatus can be made low-cost and compact.
- FIG. 1 is a perspective view of a rotary working device according to an embodiment of the present invention. It is a top view which shows mesh
- FIG. 3 is a cross-sectional equivalent view taken along line AA in FIG. 2.
- FIG. 3 is a cross-sectional equivalent view taken along line BB in FIG. 2.
- FIG. 3 is a cross-sectional equivalent view taken along the line CC of FIG. 2. The state just before removing both electrodes from the state of Drawing 2 by rotating both rotary bodies from a shank tip is shown.
- FIG. 1 shows a rotary working device 1 according to an embodiment of the present invention.
- the rotary working device 1 is disposed on the side of the conveyance path R of the automobile production line, and is an electrode removing work for removing the electrode 10 from the tip of the shank S1 of the welding gun G for spot welding held by a welding robot (not shown).
- the electrode cutting operation for cutting the tip of the electrode 10 to which the oxide film is adhered by repeating welding is performed (see FIGS. 4 and 5).
- a casing 2 having a substantially rectangular shape in plan view is provided at the center of the rotary working device 1.
- Case support mechanisms 12 are attached to both sides of the casing 2 on the side opposite to the line conveyance direction on the side opposite to the conveyance path R, and the case support mechanism 12 incorporates a coil spring (not shown) inside, and is vertically directed with respect to the casing 2. When a force is applied, the shock is absorbed.
- the upper surface in the middle of the line conveyance direction in the casing 2 has a shape that bulges upward as it is away from the conveyance path R, and a plurality of back surfaces on the side opposite to the conveyance path R of the casing 2 as shown in FIG. These reinforcing ribs 2d are juxtaposed in the line conveying direction.
- a pair of upper through holes 2 a having the same circular shape are juxtaposed in the line conveying direction on the upper surface of the casing 2 on the conveyance path R side, Lower through-holes 2b are formed through the portions corresponding to the respective upper through-holes 2a.
- a servo motor 5 is attached to the end portion of the casing 2 on the side opposite to the conveyance path R, and the servo motor 5 has a horizontal direction in which the rotation shaft 5a intersects the line conveyance direction. It is in a posture that extends to.
- the rotating shaft 5a of the servo motor 5 faces the casing 2 through a communication hole 2c formed at the end of the casing 2 on the side opposite to the conveying path R, and communicates with the casing 2 inside. Is attached with an input gear 5b having a substantially truncated cone shape.
- a first rotating shaft Sh ⁇ b> 1 extending in the vertical direction is rotatable about the casing 2 via bearings B ⁇ b> 1 respectively attached to the upper end and the lower end of the first rotating shaft Sh ⁇ b> 1. It is supported.
- a bevel gear 6 that meshes with the input gear 5b from below is integrally attached to the first rotation shaft Sh1.
- a first intermediate gear 7 is fixed to the bevel gear 6 at a plurality of pins P1 below the bevel gear 6 below the first rotation shaft Sh1, and rotates together with the bevel gear 6. It is like that.
- a second rotating shaft Sh2 extending vertically is pivotally supported on the casing 2 via bearings B2 attached to the upper end and the lower end of the second rotating shaft Sh2, respectively, at substantially the center inside the casing 2.
- a second intermediate gear 8 meshing with the first intermediate gear 7 is attached to the second rotation shaft Sh2 so as to rotate together, and the servo motor 5 constitutes the drive means 13 of the present invention.
- the first peripheral portion having a ring shape is formed on the peripheral portion of the upper through hole 2 a located on the upstream side in the line conveying direction and the peripheral portion of the lower through hole 2 b corresponding to the upper through hole 2 a.
- a bush 31 is attached, and an annular step portion 31a is formed on the inner peripheral surface of the first bush 31, while an annular protrusion 31b is projected on the inner peripheral back surface.
- first output gear 32 (rotary body) that can rotate around a rotation center C ⁇ b> 1 that faces vertically, and the first output gear 32 is connected to the servo motor 5. It is located below the rotating shaft 5a.
- the rotation shaft 5a of the servo motor 5 is positioned above the first output gear 32, and the servo motor 5 has its rotation shaft 5a intersecting the rotation center C1 of the first output gear 32. It is provided in a posture extending in the direction.
- An annular ridge 33 having a substantially T-shaped cross section protruding outward is formed on the outer peripheral edge of the first output gear 32.
- the annular protrusion 33 includes an annular thin base portion 33a that protrudes outward and extends around the rotation center, and an overhang portion 33b that protrudes up and down from the outer peripheral edge of the base portion 33a. Is located between the annular projections 31 b of the first bushes 31.
- a plurality of first tooth portions 33c are arranged in a ring around the rotation center C1 at equal intervals on the outer peripheral edge of the overhang portion 33b.
- five concave grooves 33d (concave portions) that are recessed radially outward and extend in the vertical direction are recessed at equal intervals around the rotation center C1. Is formed.
- each first bush 31 has a substantially disc-shaped cover member 34 (annular body) that can rotate around the rotation center C1 in a state where the rotation center coincides with the rotation center C1 of the first output gear 32. Is inserted, and an electrode insertion hole 34 a for inserting the electrode 10 into the first output gear 32 is formed through the center of each cover member 34.
- Each pressing member 35 constitutes a holding tool 37 of the present invention together with the cover member 34, and is pivotally supported on the both cover members 34 by screws 35 a (support shafts) extending vertically, and the first output gear 32. It can turn to the rotation center C1 side.
- each pressing member 35 On the rotation center C1 side of each pressing member 35 is formed a curved surface 35b that curves so as to bulge outward in the radial direction of the first output gear 32, while on the counter rotation center C1 side of each pressing member 35. Are provided with protrusions 35c that are loosely fitted into the respective concave grooves 33d.
- a second ring-shaped second peripheral portion of the upper through-hole 2a located on the downstream side in the line conveying direction and a peripheral portion of the lower through-hole 2b corresponding to the upper through-hole 2a are formed.
- a bush 41 is attached, and an annular step portion 41 a is formed on the inner peripheral side rear surface of the second bush 41.
- a ring-shaped second output gear 42 (rotating body) that rotates around a rotation center C2 that is directed vertically is provided.
- the second output gear 42 is connected to the first output gear 32.
- the pitch circle diameter is the same.
- first output gear 32 and the second output gear 42 have the same outer diameter, and are juxtaposed in the radial direction so that the rotation centers C1 and C2 are directed in the same direction.
- the outer peripheral portion of the second output gear 42 protrudes vertically and has a thickness, and the same number of second tooth portions 42a as the first tooth portions 33c of the first output gear 32 are centered on the outer peripheral edge thereof. It is arranged in a circle around the C2 at regular intervals.
- annular cutter fixing member 43 On the inner peripheral side of the second output gear 42, an annular cutter fixing member 43 is provided to rotate integrally with the second output gear 42, and a cutting cutter 44 is mounted inside the cutter fixing member 43. Yes.
- the cutting cutter 44 is formed by assembling plate members 44a and 44b having substantially the same outer diameter in a cross shape in a plan view, and one side surface and the other side of one plate member 44a.
- the intersection of the two plate members 44a and 44b is eccentric in plan view so that the line of intersection with one side surface of the plate member 44b coincides with the rotation center C2 of the second output gear 42.
- a pair of curved portions 45a are formed in a concave shape above and below the plate member 44a, while a pair of curved portions 46a are formed in a concave shape above and below the plate member 44b.
- a cutting blade portion 45 b extending along the radial direction of the electrode 10 is provided on one side in the longitudinal direction of each of the curved portions 45 a so as to correspond to the tip surface of the electrode 10.
- a control panel 11 (control means) is connected to the servo motor 5, and the control panel 11 outputs a removal start signal, a clamping release signal, and a cutting start signal to the servo motor 5.
- the control panel 11 includes a storage unit 11a that stores a first rotation speed that is a low rotation speed and a second rotation speed that is a higher rotation speed than the first rotation speed.
- a removal start signal is output to the servo motor 5 to rotate the first and second output gears 32 and 42 at the first rotation speed, while the second output gear 42 cuts the electrodes.
- a cutting start signal is output to the servo motor 5 to rotate the first and second output gears 32 and 42 at the second rotational speed.
- the control panel when performing the electrode removal work, as shown in FIGS. 2 and 6, the control panel is set with the electrode 10 set between the pressing members 35 so that the central axis thereof coincides with the rotation center C1.
- 11 outputs a detachment start signal to the servo motor 5, and rotates the first output gear 32 around the rotation center C1 via the input gear 5b, the bevel gear 6, the first intermediate gear 7 and the second intermediate gear 8 which are meshed with each other.
- 1 (X4 direction in FIG. 2) is rotated at a first rotational speed, and the inner surface of each groove 33d rotates each projection 35c by the relative rotation of the first output gear 32 with respect to the holding tool 37.
- each pressing member 35 rotates to the rotation center C1 side and presses the outer peripheral surface of the electrode 10 so as to sandwich the electrode 10 therebetween. Then, when the first output gear 32 further rotates to one side around the rotation center C ⁇ b> 1 with the pressing members 35 sandwiching the electrode 10, the first output gear 32 together with the clamp 37 has the electrode. 10 is rotated around the center axis of the electrode and removed from the tip of the shank S1.
- the control panel 11 outputs a clamping release signal to the servo motor 5 and meshes with the input gear 5b, the bevel gear 6, the first intermediate gear 7, and the first gear. 2
- the first output gear 32 is rotated in the other direction (the direction opposite to X4 in FIG. 2) around the rotation center C1 via the intermediate gear 8, the relative rotation operation of the first output gear 32 with respect to the clamping tool 37 is performed.
- the inner surfaces of the concave grooves 33d push the projections 35c to the other side in the rotational direction, whereby the pressing members 35 rotate to the counter-rotation center C1 side, and the pressing members 35 hold the electrodes 10 with the pressing members 35. Is to be canceled.
- the control panel 11 when performing the electrode cutting operation, the control panel 11 outputs a cutting start signal to the servo motor 5, and the input gear 5 b, the bevel gear 6, the first intermediate gear 7 and the second intermediate gear 8 are engaged with each other.
- the second output gear 42 is rotated together with the cutting cutter 44 to one side around the rotation center C2 (X5 direction in FIG. 2) at the second rotational speed, and in this state, the tip surface of the electrode 10 is rotated to the cutting cutter 44.
- the cutting blade portion 45b cuts the distal end surface of the electrode 10 when it reaches the curved portions 45b and 46a.
- An electrode storage box 9 (electrode storage means) capable of storing a plurality of electrodes 10 before use on both sides of the casing 2 in the line transport direction on the transport path R side (outside in the radial direction of the first and second output gears 32 and 42). ) Is provided.
- the electrode storage box 9 has a thick and flat plate shape and a symmetrical shape with respect to the casing 2, and can be attached to and detached from the casing 2 by a lever 9a.
- the electrode storage box 9 is provided with a disk part 91 whose center of rotation is directed up and down (in the same direction as the first and second output gears 32 and 42), and a cover part 92 that covers the disk part 91.
- a cutout portion 92a (electrode extraction position) having a substantially rectangular shape in a plan view is formed on the transport path R side of the cover portion 92.
- the cutout portion 92a is formed on the first and second output gears 32 and 42. It is located on a straight line connecting the rotation centers.
- each electrode storage hole 91 a that open upward are formed at equal intervals around the center of rotation, and each electrode storage hole 91 a has the electrode 10 before use in the center axis of the electrode 10. Is stored in a posture that faces upward and downward and that opens upward.
- the electrode storage holes 91a correspond to the cutout portions 92a in order, and are stored in the electrode storage holes 91a corresponding to the cutout portions 92a.
- the clamping tool 37 is mounted on the inner side of the first output gear 32 and the cutting cutter 44 is mounted on the inner side of the second output gear 42. Since the rotation speeds of the second output gears 32 and 42 can be freely set, the cutting cutter 44 is attached to the first output gear 32 and rotated at the second rotation speed, or the clamping tool 37 is attached to the second output gear 42. Can be mounted and rotated at the first rotational speed.
- the first and second output gears 32 and 42 can be both equipped with a holding tool 37, and conversely, the first and second output gears 32 and 42 can be both equipped with a cutting cutter 44.
- the bevel gear 6 in the embodiment of the present invention is a helical bevel gear
- the first intermediate gear 7, the second intermediate gear 8, the first output gear 32, and the second output gear 42 are helical gears. It is.
- these gears can be replaced with ordinary bevel gears and spur gears.
- the cutting cutter 44 has a cross shape in a plan view, but the present invention is not limited to this, and a cutting cutter having another shape may be mounted inside the cutter fixing member 43.
- the electrode 10 attached to the tip of the shank S1 is inserted into the electrode insertion hole 34a in the cover member 34, and the center axis of the electrode 10 is made to coincide with the rotation center C1 of the first output gear 32 as shown in FIG. .
- the control panel 11 When a detachment start signal is output from the welding robot (not shown) to the control panel 11, the control panel 11 outputs a detachment start signal to the servo motor 5, and an input as shown in FIG.
- the first output gear 32 is rotated by rotating the gear 5b in the X1 direction, rotating the bevel gear 6 and the first intermediate gear 7 in the X2 direction, and further rotating the second intermediate gear 8 in the X3 direction accordingly. Rotate in X4 direction.
- the first output gear 32 rotates around the rotation center C1 in the X4 direction at the first rotation speed relative to the holding tool 37, and the inner surfaces of the concave grooves 33d are the protrusions of the pressing member 35. Press 35c in the X4 direction.
- the pressing members 35 whose respective projections 35c are pressed in the X4 direction rotate to the rotation center C1 side to press the outer peripheral surface of the electrode 10 and sandwich the electrode 10 between the pressing members 35.
- the first output gear 32 moves the electrode 10 around the electrode central axis together with the clamping tool 37. To remove from the shank S1.
- each concave groove 33d presses each projection 35c of the pressing member 35 in the anti-X4 direction by rotating around the rotation center C1 in the anti-X4 direction.
- the shank S1 moves downward, the tip of the shank S1 is inserted from above into the opening of the electrode 10 before use stored in the electrode storage hole 91a corresponding to the notch 92a, and the electrode 10 is attached to the tip of the shank S1. It is done.
- the electrode 10 mounted on the tip of the shank S1 is moved above the cutting cutter 44, and the center axis of the electrode 10 is made to coincide with the rotation center C2 of the second output gear 42.
- the electrode 10 is brought close to the cutting cutter 44 along the rotation center C2 of the second output gear 42. Then, the cutting edge portion 45b of the rotating cutting cutter 44 comes into contact with the tip surface of the electrode 10, and the cutting surface of the electrode 10 is cut by the cutting cutter 44 rotating around the electrode central axis.
- the holding tool 37 and the cutting cutter 44 are respectively connected to the first and second output gears 32, It is possible to appropriately perform the removal or cutting work regardless of which of the two is attached. Therefore, for example, even in the case where the rotary working device 1 is arranged on the left and right of the production line in a symmetrical production line, the first and second output gears 32 and 42 to which the holding tool 37 and the cutting cutter 44 are attached are opposed. As a result, the rotary working device 1 is also symmetric, and the cost is not increased.
- the holding tool 37 can be attached to both the first and second output gears 32 and 42, or the cutting cutter 44 can be attached to both the first and second output gears 32 and 42, versatility is high. Furthermore, since the first and second output gears 32 and 42 are simultaneously rotated by the single second intermediate gear 8 positioned between them, the number of gears can be reduced as compared with Patent Document 1, and the rotary working device is low-cost and compact. Can be 1.
- the cutting position, the removal position, and the mounting position of the electrode 10 in the rotary work device 1 are positioned on a straight line, for example, the operation of a robot or an automatic machine that moves the electrode 10 in the production line is simplified.
- the line tact can be shortened.
- the servo motor 5 is in a posture extending in a direction intersecting with the rotation centers C1 and C2 of the first and second output gears 32 and 42, when performing the cutting operation or the removal operation of the electrode 10, A part of a robot or an automatic machine that brings the electrode 10 closer to the first and second output gears 32 and 42 along the directions of the rotation centers C ⁇ b> 1 and C ⁇ b> 2 is less likely to contact the rotary work device 1.
- the electrode 10 to be removed can be clamped by utilizing the rotation operation of the first output gear 32 in the electrode removal operation, a drive source other than the servo motor 5 for rotating the first output gear 32 is prepared separately. There is no need to pinch 10, the equipment is simple, the cost can be reduced, and the compact rotary work device 1 can be obtained.
- the present invention is suitable for, for example, a rotary work device that performs a cutting operation of an electrode tip surface or a removal operation of removing an electrode from a shank tip by a rotating operation on an electrode for spot welding used in an automobile production line.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Resistance Welding (AREA)
- Manipulator (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Transmission Devices (AREA)
- Robotics (AREA)
Abstract
Description
5 サーボモータ
5a 回転軸
8 第2中間歯車
9 電極格納ボックス(電極格納手段)
10 電極
11 制御盤(制御手段)
11a 記憶部
13 駆動手段
32 第1出力歯車(回転体)
33c 第1歯部
33d 凹条溝(凹部)
35a ネジ(支軸)
35c 突起
34 カバー部材(環状体)
37 挟持具
42 第2出力歯車(回転体)
44 切削カッター
53 押圧部材
92a 切欠部(電極取出位置)
C1,C2 回転中心
S1 シャンク
G スポット溶接用ガン
Claims (5)
- スポット溶接用ガンのシャンク先端に装着された電極を挟持具で挟持しながら当該挟持具を電極中心軸周りに回転させることにより上記シャンク先端から取り外す電極取外作業を行うか、又は、上記シャンク先端に装着された上記電極の先端面に切削カッターを接触させるとともに当該切削カッターを電極中心軸周りに回転させることにより上記電極先端面を切削する電極切削作業を行う回転作業装置であって、
内方に上記挟持具か又は上記切削カッターが装着され、且つ、外周に複数の歯部を環状に有し、互いの回転中心が同方向に向くよう径方向に並設された一対の回転体と、
該両回転体の各歯部に噛み合う中間歯車及び該中間歯車を回転させるサーボモータを有する駆動手段と、
上記サーボモータに接続され、且つ、互いに異なる第1回転数及び該第1回転数より高回転数である第2回転数を記憶する記憶部を有し、上記両回転体の少なくとも一方で電極取外作業を行う際、上記サーボモータに取外開始信号を出力して上記第1回転数で上記両回転体を回転させる一方、上記両回転体の少なくとも他方で電極切削作業を行う際、上記サーボモータに切削開始信号を出力して上記第2回転数で上記両回転体を回転させる制御手段とを備えていることを特徴とする回転作業装置。 - 請求項1に記載の回転作業装置において、
上記回転体の径方向外側には、使用前の上記電極をその電極中心軸が上記回転体の回転中心と同方向に向く姿勢で複数格納可能な電極格納手段が設けられ、
該電極格納手段に格納された上記電極の取出位置は、上記両回転体の回転中心を結ぶ直線上に位置していることを特徴とする回転作業装置。 - 請求項1又は2に記載の回転作業装置において、
上記サーボモータは、その回転軸が上記両回転体の回転中心と交差する方向に延びる姿勢で設けられていることを特徴とする回転作業装置。 - 請求項1から3のいずれか1つに記載の回転作業装置において、
上記サーボモータの回転軸は、上記回転体よりも上方に位置していることを特徴とする回転作業装置。 - 請求項1から4のいずれか1つに記載の回転作業装置において、
上記挟持具は、回転中心が上記回転体の回転中心と合致した状態で回転可能な環状体と、
該環状体の回転中心周りに等間隔に設けられ、回転中心と同方向に延びる支軸により回転中心側に回動可能に軸支された複数の押圧部材とを備え、
該各押圧部材には、突起が反回転中心側に突設される一方、上記回転体内周面には、上記各突起が遊嵌する凹部が複数凹設され、
上記電極を上記各押圧部材間において電極中心軸が回転中心と合致するようセットした状態で上記回転体を回転中心周りの一方に回転させ、当該回転体の上記挟持具に対する相対的な回転動作で上記各凹部内面が上記各突起を回転方向一方側に押すことにより、上記各押圧部材が回転中心側に回動するとともに上記電極外周面を押圧して上記電極を挟み込み、さらなる上記回転体の回転中心周り一方側への回転動作により上記電極を上記挟持具とともに回転させて上記シャンク先端から取り外すことを特徴とする回転作業装置。
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BR112014028134A BR112014028134B1 (pt) | 2014-02-06 | 2014-02-06 | dispositivo de trabalho rotativo |
PCT/JP2014/000644 WO2015118573A1 (ja) | 2014-02-06 | 2014-02-06 | 回転作業装置 |
CA2932292A CA2932292C (en) | 2014-02-06 | 2014-02-06 | Rotary work device |
KR1020147031043A KR101632823B1 (ko) | 2014-02-06 | 2014-02-06 | 회전작업 장치 |
KR1020157033293A KR101605667B1 (ko) | 2014-02-06 | 2014-02-06 | 스폿 용접용 전극 분리장치 |
CN201480001298.6A CN104981320B (zh) | 2014-02-06 | 2014-02-06 | 旋转式作业装置 |
MX2016009791A MX371015B (es) | 2014-02-06 | 2014-02-06 | Dispositivo de trabajo rotatorio. |
EP14796652.7A EP2926937B1 (en) | 2014-02-06 | 2014-02-06 | Rotating work device |
JP2014534862A JP5859662B1 (ja) | 2014-02-06 | 2014-02-06 | 回転作業装置 |
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