JPH0349831Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is an electrode shaping device for grinding and shaping electrodes of spot welding machines and other resistance welding machines.

(Prior Art) Conventionally, this type of device has a main body equipped with an electrode insertion portion into which the electrode of a resistance welding machine can be freely inserted, and a rotary blade that is positioned in the electrode insertion portion and grinds the electrode. In this case, an electric motor is generally used as the rotational drive source for the rotary blade, but it is also possible to use an air actuator such as an air cylinder instead. As proposed in No. 58-106785, an air cylinder is used as the drive source, and the rotary blade is intermittently driven to rotate through a rack reciprocated by the cylinder, a pinion that engages the rack, and a one-way clutch. It is also being considered to make

(Problem that the invention aims to solve) In any case, with the above device, when shaping the electrode, chips may accumulate near the rotating blade and interfere with shaping.In this case, conventionally, the chips were removed manually. This makes it difficult to work with, and it is desirable to be able to automatically remove it.

In order to satisfy this request, it is possible to install an air blow nozzle connected to the air source to blow away the chips, but in this case, it is necessary to open and close it so that air is not blown out unnecessarily when the electrode shaping device is not operating. An air circuit dedicated to the nozzle with a valve interposed therein and a control circuit for the on-off valve are required, resulting in a problem of increased equipment costs.

In view of the above points, it is an object of the present invention to provide an inexpensive shaping device that can remove chips without using a special air circuit for air blowing.

(Means for Solving the Problems) The present invention is a device that uses an air actuator as a drive source for a rotary blade, and uses exhaust air from the air actuator to remove chips. In order to achieve this, a pipe is provided to guide the exhaust air from the air actuator, and the tip of the pipe is made to face the electrode insertion portion of the main body of the device.

(Example) Embodiments of the present invention will be explained with reference to attached drawings.

In the drawings, reference numeral 1 denotes a frame-like device body having an upper lid 1a, into which a pair of upper and lower electrodes a, a for a resistance welding machine (not shown) can be inserted from above and below. An insertion section 2 is provided, and the insertion section 2 includes:
Three rotary blades 3 having upper and lower blade portions extending along the slope of the circumferential surface of the tip end of each electrode a are supported by a rotary disk 4 and provided in a radial manner.

To explain this in more detail, the rotary plate 4 has intermediate seats 5 above and below the central portion located in the insertion portion 2, and has concave holes 6, 6 into which each electrode a can be freely inserted. ,
Three slits 7, 7, 7 are formed around the periphery extending outward from the seat 5 in the radial direction, and each rotary blade 3 is slidably inserted into each slit 7, and the diameter is adjusted by a spring 8. When the electrodes a, a are inserted into the recessed holes 6, 6, each rotary blade 3 applies a predetermined pressing force to the curled portion of the tip of each electrode a. When the rotary blades 3 rotate due to the rotation of the rotary disk 4, the rotary blades 3 are pressed by the spring 8 while grinding the curled portion, and are pressed against the circumferential side of the catch seat 5. They were advanced to a position where they abutted, and the two electrodes a, a were ground and shaped.

Then, the rotary plate 4 is connected to the drive gear 9 in the device main body 1.
The driven gear 10 is fitted into the recessed part 10a at the center of the driven gear 10, and is engaged with the pin 11 to prevent rotation.
A one-way clutch 12 is disposed coaxially with the drive gear 9.
A pinion 13 is connected to the pinion 13 via the air cylinder 13, and an air cylinder 14, which is an air actuator, is connected to the tail end of the device body 1.
and the rack 15 reciprocated by the air cylinder 14 is engaged with the pinion 13,
Thus, each time the rack 15 is moved to the right in the drawing, the rotation plate 4, and therefore each rotary blade supported thereon, is rotated through the pinion 13 → one-way clutch 12 → drive gear 9 → driven gear 10. 3 is intermittently rotated counterclockwise in the drawing.

The above is not particularly different from the above-mentioned proposal, and as it stands, chips tend to accumulate near the rotary blade 3 during electrode shaping, and in particular, a lot of chips accumulate in the concave hole 6 on the upper side of the rotary disk 4. Become.

Therefore, in the illustrated embodiment, in accordance with the features of the present invention, a pipe 16 is provided to guide the exhaust air from the air cylinder 14, and the tip of the pipe 16 is made to face above the electrode insertion portion 2 of the device main body 1. Ta. To explain this in more detail, in the illustrated example, a switching valve 17 configured as shown in the third figure is arranged at the upper part of the barrel of the air cylinder 14, and the switching valve 17 connects the air supply port 18 connected to the air source to the exhaust port 18. The port 19 is alternately connected to one chamber and the other chamber in the air cylinder 14 to cause the rack 15 to reciprocate, and the pipe 16 is connected to the exhaust port 19.
is connected so that exhaust air is guided to the pipe 16 during any reciprocation of the rack 15.

In addition, in the illustrated example, each rotary blade 3 is mounted on the rotary disk 4.
A through hole 20 is formed adjacent to the side surface on the rotational direction side and passes vertically through the hole 6 to prevent chips from accumulating in the upper recessed hole 6. In the drawings, reference numeral 16a indicates a holding tool for the pipe 1b provided on the upper lid 1a of the main body 1 of the apparatus.

Next, the operation of the present invention will be explained based on the above embodiment. When the rack 15 is reciprocated by the operation of the air cylinder 14, each rotary blade 3 is rotated counterclockwise as described above each time the rack 15 is reciprocated. Then, the electrodes a, a, which are inserted into the electrode insertion part 2 of the device main body 1 from above and below, are ground and shaped. At this time, the exhaust air from the air cylinder 14 is passed through the switching valve 17 to the exhaust port 19. The exhaust air is guided to the continuous pipe 16 and blown onto the electrode insertion part 2 from above, and the chips in the recessed hole 6 on the upper side of the rotary plate 4 are blown away, and the upper blade of each rotary blade 3 is blown away. At the same time, the exhaust air guided to the lower concave hole 6 through each through hole 20 prevents chips from adhering to the lower blade portion of each rotary blade 3. It is kept clean and thus both electrodes a, a can be precisely ground and shaped.

Air cylinder 1 as an air actuator
4 has been described, but the invention is not limited to this. For example, an impeller-type air actuator as seen in Japanese Patent Publication No. 58-38279 may be used. Any device that operates while exhausting air is fine.

(Effect of the invention) As described above, according to the invention, chips can be removed using the exhaust air from the air actuator, which is the driving source of the rotary blade, and there is no problem in shaping the electrode. There is no need for this method, and the structure only requires the provision of a pipe that guides the exhaust air to the electrode insertion portion of the main body of the device, which has the effect of simplifying the structure and lowering the cost compared to a device having a dedicated circuit for air blowing.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway plan view of an example of the proposed device;
2 is a side view taken along the line -- in FIG. 1, and FIG. 3 is a diagram showing the air circuit diagram thereof. a...Electrode, 1...Device main body, 2...Electrode insertion portion, 3...Rotary blade, 14...Air cylinder (air actuator), 16...Pipe.

Claims (1)

[Scope of utility model registration request] An air actuator is provided with a device body having an electrode insertion part into which an electrode of a resistance welding machine can be freely inserted, and a rotary blade that is placed in the electrode insertion part to grind the electrode, and operates while exhausting air by supplying compressed air. Electrode shaping of a resistance welding machine, characterized in that a pipe is provided to guide exhaust air from the actuator, and the tip of the pipe faces the electrode insertion part. Device.