JPH0744438Y2 - Electrode polishing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an electrode polishing apparatus applied to a stud welder having a pair of electrodes.

(Prior Art) Conventionally, as an electrode polishing apparatus for a welding machine, for example, one described in JP-B-53-46619 is known.

This conventional electrode polishing apparatus is a handy type in which a blade protruding at the tip of a body is rotated by an air motor to polish an electrode.

There is also known a device having a similar structure and automatically polishing when the electrode of the welding machine is applied to the blade.

(Problems to be solved by the invention) However, when polishing a stud welder in which a pair of two electrodes is supported by a tilt mechanism so as to be swingable, in the latter automatic polishing device, the electrodes are bladed. When pressed against the part, there was a problem that the electrode was rotated by the swinging motion and could not be pressed straight and could not be polished.

Therefore, when polishing the electrodes of such a stud welder, the former handy type was used, and the electrode portions were fixed by hand to perform polishing.

However, in this case, the problems listed below occurred.

The electrode must be pressed with one hand to fix the swing, and the other hand must perform the polishing work with the polishing device, which is complicated and the workability is poor.

If the stud welder is attached to the robot, the robot must be stopped each time the electrode is polished, which increases the robot stop time and is inefficient. Incidentally, the polishing of such an electrode is usually 1 to
It is performed every 3 hours.

If you try to polish two electrodes at the same time by using two polishing devices, and the pitch between two electrodes is small (for example, 80 mm or less), set the blade of the polishing device to the electrode. However, it is difficult in terms of space and cannot be polished.

The present invention has been made in view of the above-mentioned conventional problems, and is an electrode polishing apparatus capable of efficiently polishing electrodes of a stud welding machine supported by a tilt mechanism in pairs of two electrodes. The purpose is to provide a device.

(Means for Solving the Problems) In order to solve the above-mentioned object, in the electrode polishing apparatus of the present invention, a polishing tool for polishing an electrode is slidably supported on a base, and the polishing tool is A flat plate portion is provided extending in a direction orthogonal to the sliding direction, and a blade portion that projects from the flat plate portion in the sliding direction to polish the electrode is provided, and the base is A means for providing the polishing tool with a biasing member for slidingly biasing the polishing tool toward the tip of the blade portion with a predetermined pressure is used.

(Function) In the electrode polishing apparatus of the present invention, two electrodes are polished one by one. At this time, one electrode is pressed against the blade portion and the other electrode is brought into contact with the flat plate portion. . Therefore, even if a reaction force applied to one electrode is applied, the other electrode abuts against the flat plate portion and is received, so swinging by the tilt mechanism is restricted, and the electrode does not escape from the blade portion during polishing. It can be pressed firmly and polished. Then, when the polishing of one electrode is finished, this electrode is brought into contact with the flat plate portion and the other electrode is pressed against the blade portion and polished.

Also, since the polishing tool is slidably supported on the base and is biased in the protruding direction of the blade by the biasing member, the polishing tool is biased when the electrode is pressed against the blade. It retreats against the member, the impact at the time of pressing is relieved, the electrode is prevented from being damaged, and the urging force of the urging member makes the pressing force of the blade portion against the electrode constant, which enables proper polishing .

Therefore, when the welding machine is attached to the robot, the above-mentioned polishing work can be automatically performed by setting the robot reference point at the blade portion of the polishing tool.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings. In the electrode polishing apparatus of this embodiment, a stud welder in which a pair of electrodes is supported by a tilt mechanism is taken as an object to be polished, and the stud welder is attached to a robot.

First, the configuration of the embodiment will be described.

FIG. 1 is a side view showing the electrode polishing apparatus of this embodiment, and FIG. 2 is a front view showing the main part thereof, in which 1 is a base.

The base 1 includes a base plate 10, a main frame 11 erected on the base plate 10, upper and lower horizontal frames 12 and 12 extending forward from the main frame 11, and the horizontal frame 12 Support plate 13 provided between the tips of
And the upper and lower guide frames 14, 1 on the support plate 13.
4 extends forward (to the left in the figure).

The polishing tool 2 having a blade portion 20 at its tip is supported on the base 1 so as to be slidable in the front-rear direction with the blade portion 20 facing forward. The support structure in this case is such that the slide plate 3 is fixed to the polishing tool 2, and the upper and lower ends of the slide plate 3 are slidably fitted to the guide frames 14, 14.

The polishing tool 2 is a commercially available product in which an air motor 22 is built in a cylindrical body 21 and a blade portion 20 that is rotated by the drive of the air motor 22 projects from the tip of the body 21.

The drive of the air motor 22 is controlled by a controller (not shown), and this controller opens an air supply valve (not shown) when the stud welding machine approaches the device of this embodiment based on a signal from the robot. Air motor
22 is driven, and when it is separated from a predetermined position, the air supply valve is closed to stop driving.

Then, around the blade portion 20, a disc 4 as a flat plate portion is formed.
The disk 4 is provided with a slide plate 14 in a direction extending in a direction orthogonal to the sliding direction of the slide plate 3.
The blade portion 20 is fixed so that the blade portion 20 projects from the front surface thereof.

The polishing tool 2 is slidably biased toward the tip of the blade 20 by a spring member (biasing member) 5. Explaining this structure, the upper and lower pins 50, 50 extending forward from the support plate 13 are pin holes 30, formed in the slide plate 3.
The spring members 5, 5 are attached to the pins 50, 50 so as to be inserted into the support member 30 and interposed between the support plate 13 and the slide plate 3.

The welding machine to be polished by the electrode polishing apparatus of this embodiment is a stud welding machine having a pair of electrodes 6,6, and this stud welding machine is attached to a robot.

Then, as shown in FIG. 3, the electrodes 6 and 6 are attached to a holder 60 so as to form a pair at a predetermined pitch, and the holder 60 is pivotally attached to a bracket 61 by a pin 62. It is formed so that it can be swung by the worn tilt mechanism.
It should be noted that this tilt mechanism is such that even if there is a step in the members 70, 71 to which the electrodes 6, 6 are brought into contact, they can be brought into contact with both members 70, 71 with equal pressing force. is there.

Further, the proximity switch 8 is provided on the support plate 13 of the base 1, and when the slide plate 3 slides to the position of the proximity switch 8, the proximity switch 8 is turned on to drive the robot (not shown). It is configured to stop.

Next, the operation of the embodiment will be described.

When polishing the electrodes 6 and 6, when the robot brings the welding machine close to the electrode polishing apparatus to a predetermined position, the air motor 22 of the polishing tool 2 is driven by the control of the controller (not shown) and the blade portion 20 rotates.

Then, the electrodes 6, 6 are polished one by one. In this case, one electrode 6 is pressed against the blade portion 20 and the other electrode 6 is brought into contact with the disc 4 as a flat plate portion. become. In this way, since the other electrode 6 is in contact with the disc 4, even if a reaction force accompanying the pressing is applied to the electrode 6 pressed against the blade portion 20, the tilt mechanism restricts the swinging. When the one electrode 6 is polished, the electrode 6 does not escape, and even a welding machine having a small pitch between the electrodes 6 can be polished. In this embodiment, since the disc 4 is used as the flat plate portion around the blade portion 20, the position of the other electrode when the one electrode 6 is brought into contact with the blade portion 20 is the same as that of the one electrode 6. The same contact state can be obtained at any position on the periphery, and positioning of both electrodes 6, 6 becomes easy.

Moreover, when the electrodes 6 and 6 are pressed against the blade portion 20 and the disc 4,
The pressing force causes the polishing tool 2 to retreat through the slide plate 3 against the spring members 5, 5. Therefore, the impact when the electrodes 6, 6 are pressed against each other is mitigated, and the electrode 6 can be prevented from being damaged.
Further, since the pressing force of the blade portion 20 against the electrode 6 becomes constant due to the urging force of the spring members 5, 5, proper polishing can be performed.

If the electrode 6 is excessively pressed by the robot, the polishing tool 2 retracts, whereby the slide plate 3 turns on the proximity switch 8 and the robot stops. For this reason, it is possible to prevent the electrodes 6, 6 and the polishing tool 2 from being damaged due to the excessive pressing force of the robot.

Incidentally, after polishing one electrode 6 as described above, the electrode 6 is removed from the blade portion 20 and the other electrode 6 is removed from the blade portion 20.
Press on 20 and polish as above.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and even if there is a design change or the like within the scope not departing from the gist of the present invention, it is included in the present invention. Be done.

For example, although the disk is used as the flat plate in the embodiment, the shape of the flat plate is not limited to the disk.

Further, in the embodiment, the example in which the stud welder is moved by a robot to automate the polishing has been described, but a person may move the stud welder. Also in this case, the tilting device is prevented from swinging without manually fixing the electrodes.

(Effects of the Invention) As described above, in the electrode polishing apparatus of the present invention, even if the stud welder has a pair of electrodes supported through a tilt mechanism, the other electrode is attached to the flat plate portion. Since one electrode can be fixed to the blade part by abutting it and restricting swinging, it is not necessary to fix each electrode by hand at the time of polishing, polishing work becomes easy and workability is improved. In addition to the effect that it can be improved and it can be used even in a welding machine with a different electrode pitch, when the welding machine is attached to the robot, the polishing operation can be easily automated. can get.

Further, since the polishing tool is slidably supported on the base and the polishing tool is slid and urged by the urging member, the pressing force of the blade portion against the electrode is constant and proper polishing can be performed. However, the impact when the electrode is pressed against the blade portion is alleviated, and the effect of preventing damage to the electrode can be obtained.

[Brief description of drawings]

FIG. 1 is a side view showing an electrode polishing apparatus according to an embodiment of the present invention, FIG. 2 is a front view showing a main part of the electrode polishing apparatus, and FIG. 3 is a side view showing electrodes of a stud welding machine to be polished. Is. 1 ... Base 2 ... Polishing tool 4 ... Disk (flat plate part) 5 ... Spring member (biasing member) 6 ... Electrode 20 ... Blade part

Claims (1)

[Scope of utility model registration request] 1. A polishing tool for polishing an electrode is slidably supported on a base, and the polishing tool is provided with a flat plate portion extending in a direction orthogonal to the sliding direction, A blade portion that projects from the flat plate portion in the sliding direction to polish the electrode is provided, and the base has an urging member that slides and urges the polishing tool in the tip direction of the blade portion with a predetermined pressure. An electrode polishing apparatus, which is provided.