JP2009285672A - Welding electrode tip detaching device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a welding electrode tip detaching device capable of simultaneously pulling out upper and lower electrode tips by making the device non-powered, surely pulling out tips, and perfectly automizing the device. <P>SOLUTION: The welding electrode tip detaching device is composed as follows: a spring 15 is wound around a support 14, and two sets of pulling out members 16a, 16b are arranged putting the spring between them; the rear end sides of upper and lower rocking arms 17a, 17b, which are equipped with two pins 11, 12 at their front end sides, are pivotally supported by a pivot 18; pins 11, which are directed to an upper tip pulling out board 5 of an upper set and directed to a lower tip pulling out board 5 of an lower set, are turnably and pivotally supported on the tip pulling out board; pins 12, which are directed to a lower tip pulling out board 7 of an upper set and directed to an upper tip pulling out board 7 of a lower set, are made movable in pin moving grooves 13 formed in the tip pulling out boards. Thus, the upper and lower tips are simultaneously detached by the control operation for a gun. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an apparatus for removing welding electrode tips that allows the upper and lower welding electrode tips respectively taper-fitted to each shank to be removed simultaneously from each shank.

  Conventionally, a device for removing upper and lower welding electrode tips respectively taper-fitted to each shank from each shank, wherein the end face of the shank and the electrode tip are separated by a gap between the large diameter portion of each shank and the electrode tip. A chip extraction plate having a substantially semicircular claw that is in contact with each end surface of the electrode chip is disposed on the distal end side of the removal device, and the end surface of the electrode tip is electroded by the nail using a power device dedicated for electrode chip removal. There is an apparatus for removing an electrode tip that allows the upper and lower electrode tips to be simultaneously removed from the shank by applying pressure in the axial direction of the tip (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2005-40830 (see FIGS. 5 to 7).

  By the way, in the apparatus as described in Patent Document 1 of the prior art, in order to widen the interval between the two extraction plates stacked in order to extract the electrode tip by the nail of the chip extraction plate, the wedge and the power for operating the wedge However, such a power system requires power and air wiring and piping in order to operate the device, which is inconvenient for installation and operation, and for generating power. Devices (air cylinders, geared motors, control devices, etc.) are expensive, and there is a risk that the price of the removal device will be expensive.

  The present invention has been made in view of the above-described problems of the prior art, and the object of the present invention is to make the electrode tip removal device powerless and to extract the electrode tip by the control operation of the welding gun. Thus, it is an object of the present invention to provide a welding electrode tip detaching device that can reliably and simultaneously remove the upper and lower welding electrode tips and can completely automate the device.

  In order to achieve the above object, a welding electrode tip removal apparatus according to the present invention is a device for removing a welding electrode tip taper-fitted to a shank from the shank, wherein the large-diameter portion of the shank A removal member formed by stacking chip extraction plates having substantially semicircular claws that are in contact with the end face of the shank and the end face of the electrode tip in the gap between the electrode tip and the electrode tip is disposed on the distal end side of the removal device. In the device for removing the electrode tip from the shank by pressurizing the end face of the electrode tip with the claws in the axial direction of the electrode tip, the spring is wound around the support column standing on the base plate, and the extraction member is Up and down swing arm with two pins arranged so that it can move up and down with two pins on each side and protruding toward the side of each chip extraction plate of each set The rear end side is pivotally supported by a pivot, and the pins protruding toward the upper chip extraction plate of the upper assembly and the lower chip extraction plate of the lower assembly are pivotally supported on the chip extraction plate, and the lower chip of the upper assembly is pivotally supported. The pin protruding from the extraction plate and the upper chip extraction plate of the lower assembly can be moved in the pin movement groove formed on the chip extraction plate, and the upper and lower electrode tips can be removed simultaneously by controlling the welding gun. It is characterized by that.

  Also, the end face behind the pivot axis of the swing arm is kept in contact with the end face of the side plate of the base plate to prevent the swing arm and the punching member from sideways. It is characterized by this.

  In the present invention, a spring is wound around a column that is erected on a base plate, and two sets of punching members are arranged so as to be movable up and down across the spring. The rear end side of the upper and lower swinging arm with two pins protruding toward the upper side is pivotally supported by the pivot, and directed toward the upper set lower chip extraction plate and the lower set lower chip extraction plate The projecting pin is pivotally supported on the chip extraction plate so as to move the pin formed on the chip extraction plate with the upper assembly lower chip extraction plate and the lower assembly protruding toward the upper chip extraction plate. Since the groove can be moved and the upper and lower electrode tips can be removed at the same time by controlling the welding gun, the electrode chin attached to each shank can be moved by moving the shank of the welding gun relative to the extraction plate. Since the electrode can be removed at the same time, the welding electrode tip removal device can be powered off so that the electrode tip can be removed, and the upper and lower welding electrode tips can be removed at the same time and the device can be fully automated. It becomes a device for removing a welding electrode tip.

  Further, the end face behind the pivot axis of the swing arm is kept in contact with the end face of the side plate of the base plate to prevent the swing arm and the punching member from sideways. In this case, the swinging arm does not swing abnormally during the removal of the welding electrode tip, and the claw on each tip side of the extraction member does not swing, and the claw can operate accurately. Thus, the electrode tip removal device for welding can be quickly and simultaneously removed without damaging the electrode tips.

  Two springs are wound around the pillars upright on the base plate, and the punching members are arranged so that they can be moved up and down with the springs sandwiched between them. The tip is projected toward the side of each chip extraction plate. Further, the rear end side of the upper and lower oscillating arms each having two pins is pivotally supported by a pivot, and the pins protruding toward the upper and lower chip extraction plates of the upper group and the lower group are attached to the upper group. The tip extraction plate is pivotally supported so that the upper chip lower chip extraction plate and the pin protruding toward the lower assembly upper chip extraction plate can move the pin movement groove formed on the chip extraction plate. Thus, by making the upper and lower electrode tips removable simultaneously by controlling the welding gun, the welding gun having the electrode tips to be extracted is moved, and the extraction plate is inserted into the gap between the electrode tips and the shank. With the claw positioned so that it fits, the movement of the shank of the welding gun causes both swinging arms to rotate around the pivot, thereby increasing the distance between the two extraction plates of each extraction member. The electrode tip is automatically extracted from the shank.

  Then, the welding gun with the electrode tip to be extracted is moved so that both claws are placed in the gap between the electrode tip and the shank, the electrode tip is extracted, and welding is performed after the electrode tip is extracted. The welding gun control operation until the gun is removed from the electrode tip removal device can be fully automated by teaching the robot control mechanism and controlling the welding gun. .

  1 to 5 relate to a welding electrode tip detaching apparatus according to a first embodiment of the present invention. FIG. 1 is a plan view of a main part, FIG. 2 is a front view thereof, FIG. 3 is a side view thereof, and FIG. Is an operation explanatory view of simultaneous upper and lower punching, and FIG.

  In the figure, reference numeral 1 denotes the whole appearance of a welding electrode tip removal device. The base plate of the welding electrode tip removal device 1 is composed of an upper plate 2, a lower plate 3 and side plates 4, and has a cross section. It is formed in a U shape.

  Reference numeral 5 denotes a chip extraction plate having a substantially semicircular claw 6 at its tip, and 7 a substantially semicircular claw 8 at its tip. The chip extraction plate 5 has a hole 9 in the rear part of the claw 6. However, a hole 10 is formed in the rear part of the claw 8 in the chip extraction plate 7, and a pin 11 is rotatably attached to the side surface of the chip extraction plate 5 to be pivotally supported. The chip extraction plate 7 has a groove 13 for moving the pin 12 on its side surface.

  Reference numeral 14 denotes a column that is erected between the upper plate 2 and the lower plate 3 constituting the base plate. A spring 15 is wound around the column 14 and can be moved up and down across the spring 15. In addition, two sets of extraction members composed of the chip extraction plates 5 and 7 are arranged. The upper assembly member 16a is stacked with the chip extraction plate 5 on the upper stage and the chip extraction plate 7 is stacked on the lower stage. The lower assembly extraction member 16b is formed with the chip extraction board 7 on the upper stage and the chip extraction plate 5 on the lower stage. It is made up of stacked items.

  The swing arm includes two swing arms 17a and 17a for the upper punch member 16a and two swing arms 17b and 17b for the lower punch member 16b. The pin 11 and the pin 12 are protruded toward the both side surfaces of the extraction member 16a with the pin 11 positioned on the tip side of the swing arm 17a, 17a, respectively. The pins 11 and 12 protrude from the distal ends of 17b and 17b toward the both side surfaces of the extraction member 16b with the pin 12 positioned higher.

  The rear ends of the two oscillating arms 17a and 17a and the two oscillating arms 17b and 17b are spaces between the column 14 and the side plate 4 of the base plate. They are pivotally supported together by a single pivot 18.

  In the welding electrode tip detaching apparatus configured as described above, a welding gun equipped with electrode tips 19 and 20 to be extracted at the top and bottom is removed by, for example, a robot from the left side of FIG. It is moved toward the device 1 so that the claws 6 and 8 of the extraction plate of the upper extraction member 16a are accommodated in the gap between the electrode tip 19 and the shank 21. It is set as the state located so that both the claws 6 and 8 of the extraction plate of the lower extraction member 16b may fit in the gap.

  At this time, as shown in FIG. 3, the upper set of the punching member 16a is positioned on the upper end side of the column 14, the lower set of the pulling member 16b is positioned on the lower end side of the column 14, and the spring 15 is extended. In this state, the swinging arms 17a and 17b are inclined at a relatively large angle, and the pivot 18 is located on the column 14 side. Therefore, the vertical distance between the pin 11 and the pin 12 in each of the swing arm 17a and the swing arm 17b is narrow, and the chip extraction plate 5 and the chip extraction plate 7 in the extraction member 16a and the extraction member 16b are respectively Almost in close contact.

  Next, by controlling the welding gun so that the shank 21 and the shank 22 approach each other by the robot, the upper set of the extraction member 16a is moved downward by the shank 21 and lowered by the shank 22 as shown in FIG. The pair of pulling members 16b are pushed upward to move while compressing the spring 15, and the inclination angles of the swinging arms 17a and 17b are reduced, and the pivot 18 is pivoted from the base 14 side to the base spray. -Move to the side plate 4 side of

  The inclination angle of the oscillating arm 17a and the oscillating arm 17b is reduced while the pin 12 in each group moves in the moving groove 13. As the pin 12 moves in the chip extraction plate 7, the chip extraction plate 5 and the chip extraction plate 7 in the extraction member 16a and the extraction member 16b are separated from each other. The electrode tip 19 from the shank 21 and the electrode tip 20 from the shank 22 are separated simultaneously by the claws 6 and 8 in the upper and lower groups.

  As described above, when the electrode tip 19 is detached from the shank 21 and the electrode tip 20 is detached from the shank 22, that is, when the electrode tips 19 and 20 are simultaneously removed, the welding gun is appropriately moved by teaching to the robot. The chip removal device 1 is deactivated by operating only the control operation, and the chip removal device 1 is operated. Therefore, the chip removal device 1 does not require power supply, air wiring or piping, and the chip removal is performed. The distance between the plates 5 and 7 is reasonably expanded in parallel with each other, so that the electrode tip 19 from the shank 21 and the electrode tip 20 from the shank 22 can be reliably removed at the same time.

  Further, when the electrode tip on one side is pulled out by this welding electrode tip removal device, for example, when the electrode tip 19 is removed from the shank 21, the device is in the state shown in FIG. The claws 6 and 8 of the extraction plate of the upper assembly member 16a are accommodated in the gap between them, and then the welding gun is controlled so that the shank 21 is moved downward by the robot. Thus, as shown in FIG. 5, the upper set member 16a is pushed downward by the shank 21 and moves while compressing the spring 15, so that the inclination angle of the swing arm 17a is reduced, and its pivot 18 is It moves downward on the side plate 4 side of the base plate from the column 14 side.

  The inclination angle of the oscillating arm 17a is reduced while the pin 12 in the upper group moves in the movement groove 13. The inclination angle is reduced in the vertical direction of the pin 11 and the pin 12. As the pin 12 moves in the chip extraction plate 7, the chip extraction plate 5 and the chip extraction plate 7 in the extraction member 16 a are separated from each other. The electrode tip 19 from 21 is detached.

  In this way, even when the electrode tip 19 is detached from the shank 21, that is, only the electrode tip 19 is removed, the tip detaching apparatus 1 is not required only by moving the welding gun appropriately by teaching to the robot and performing a control operation. Since the chip removal device 1 is activated to operate, the chip removal device 1 does not require wiring or piping such as a power source or air, and the chip extraction plates 5 and 7 are spaced apart from each other in parallel. The electrode tip 19 is reliably removed from the shank 21.

  In the apparatus of the present invention, the electrode tips 19 and 20 can be set on the tip extraction plates 5 and 7 so as to face each other in the vertical direction or in the lateral direction, so that, for example, the downward electrode tips 19 are removed from the shank 21. The upward electrode tip 20 can be removed from the shank 22 later. Furthermore, since the chip removal device 1 is not affected by gravity, the chip removal device 1 itself is removed. Either vertical or horizontal orientation can be used, and teaching to the robot is facilitated.

  In the case where the welding electrode tip removal device according to the present invention is applied to a stationary welding gun, etc., the electrode tip removal device is attached to a robot, and the electrode tip removal device is attached to the welding gun side by the robot. The robot may be controlled so as to lead to

  While the electrode tips 19 and 20 are being removed, the swinging arms 17a and 17b may swing in the lateral direction. If this lateral swing occurs, the leading end sides of the punching member 16a and the punching member 16b are accompanied accordingly. There is a possibility that the claws 6 and 8 are swung and the electrode tips 19 and 20 are damaged.

  Therefore, as shown in FIGS. 1 and 3, the end surface of the swing arm 17a behind the pivot 18 is maintained in contact with the end surface of the side plate 4 of the base plate. -If the lateral movement of the arms 17a, 17b and the extraction members 16a, 16b is to be prevented, the swinging arms 17a, 17b will extract abnormal lateral vibration during removal of the welding electrode tips. Since the claws 6 and 8 on the tip ends of the members 16a and 16b do not swing and the claws 6 and 8 can operate accurately, the upper and lower electrode chips 19 and 20 can be removed without damaging the electrode chips. At the same time, the welding electrode tip removal device can be quickly performed.

FIG. 1 is a plan view of an essential part of a welding electrode tip removing apparatus according to the present invention. FIG. 2 is a front view thereof. FIG. 3 is a side view thereof. FIG. 4 is an explanatory view of the operation when the upper and lower sides are simultaneously removed. FIG. 5 is an operation explanatory view of one-side punching.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Welding electrode tip removal device 2, 3, 4 Base plate 5, 7 Tip extraction plate 6, 8 Claw 11, 12 Pin 13 Pin moving groove 14 Post 15 Spring 16a, 16b Extraction member 17a, 17b Swing arm 18 Axis 19, 20 Electrode tip 21, 22 Shank

Claims (2)

An apparatus for removing a welding electrode tip taper-fitted to a shank from the shank, which is in contact with the end face of the shank and the end face of the electrode tip through a gap between the large diameter portion of the shank and the electrode tip. An extraction member formed by stacking chip extraction plates each having a substantially semicircular claw is disposed on the distal end side of the removal device, and the end surface of the electrode chip is pressed in the axial direction of the electrode chip by the claw. In the device for removing the chips from the shank, the springs are wound around the pillars erected on the base plate, and two sets of the above-mentioned extraction members are arranged so as to be movable up and down across the springs. The rear end of the upper and lower oscillating arms each having two pins protruding toward the side of the extraction plate is pivotally supported by a pivot, and the upper set upper chip extraction plate and the lower set lower chip A pin protruding toward the scraping plate is pivotally supported on the chip extracting plate, and the pin protruding toward the upper lower chip extracting plate and the upper upper chip extracting plate on the upper assembly is attached to the chip extracting plate. A welding electrode tip detaching apparatus characterized in that a formed groove for moving a pin can be moved and the upper and lower electrode tips can be removed simultaneously by a control operation of a welding gun. The end face behind the pivot of the swing arm is kept in contact with the end face of the side plate of the base plate to prevent the swing arm and the punching member from sideways. 2. The welding electrode tip removing device according to claim 1, wherein