JPS5820710B2 - Electrode recombination device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for changing the electrodes of a butt welding device.

Equipment for pickling, rolling, etc. for strip production is continuous, and in order to continuously feed strips into a continuous processing line, the trailing end of the leading strip and the leading end of the trailing strip must be connected to each other. Accurate and fast welding is essential.

Therefore, the present applicant developed a butt welding device as shown in Japanese Patent Application No. 136845/1982, but the welding electrodes for strip joining are subject to severe wear and tear, and therefore the welding electrodes must be replaced frequently. In order to perform work efficiently, it is necessary not only to attach and remove electrodes easily and in a short time, but also to quickly carry removed welding electrodes out of the welding equipment and to quickly carry new welding electrodes into the welding equipment. An electrode recombination device is required.

The welding apparatus is shown in FIG. 1, in which 1 is an entry frame that can move in the strip advancing direction, 2 is an exit frame that is spaced apart from the entry frame 1 by a required distance, A lever 4 is pivotally mounted above the strip exit side of the entry frame 1 and above the strip entry side of the exit frame 2 and is pivoted back and forth by a fluid pressure cylinder 3.

A rod 5 is pivotally attached to one end of the lever 4, and a clamp cylinder 6 is attached to the lower end of the rod 5.

Further, upper welding electrodes 8 are attached to the lower surface of the frame 7 provided at the lower part of the clamp cylinder 6 by appropriate means such as bolts attached at required intervals in the width direction of the strip.

A frame 9 is fixed to the lower side of the strip outlet side of the input side frame 1 and the lower side of the strip input side of the output side frame 2, and the upper surface of the frame 9 has bolts etc. installed at required intervals in the strip width direction. Lower welding electrode 10 is fixed by appropriate means.

An example of a conventional device for rearranging the welding electrodes of the above-mentioned welding device is shown in FIG. 2, in which 11 is a banger that can be slid left and right, 12 is a shaft for attaching the banger 11, Both sides of the shaft 12 can be suspended by a crane or the like.

When replacing the welding electrode with the above-mentioned electrode changing device, the gap between the inlet frame 1 and the outlet frame 2 is widened to the extent that the electrode changing device can be carried in, and the fluid pressure cylinder 3 is operated to replace the upper welding electrode. Lower the upper welding electrode 8 and bring it into close contact with the lower welding electrode 10 as shown in the right half of FIG. is released, and the clamp cylinder 6 etc. are raised by the fluid pressure cylinder 3.

Then, the frame 1 also rises together with the clamp cylinder 6, but the upper welding electrode 8 remains on the upper surface of the lower welding electrode 10.

After the upper and lower welding electrodes 8, 10 are disengaged from the frame 7.9, the rearranging device shown in FIG. 2 is moved in a direction perpendicular to the plane of the paper as seen in FIG. Once inserted into the strip, the inlet frame 1 is moved to the downstream side of the strip to narrow the gap between the inlet frame 1 and the outlet frame 2, and the lower welding electrode 10 is replaced with the upper welding electrode 8 by the nozzle 11 of the rearrangement device. 1, and then lift it up a little with a crane or the like, and when a gap is created between the lower surface of the lower welding electrode 10 and the frame 9, move the reassembly device in a direction perpendicular to the plane of the paper as seen in Figure 1. When carrying the upper and lower welding electrodes 8.10 out of the welding apparatus and carrying the upper and lower welding electrodes 8.10 into the welding apparatus, the operations were performed in the reverse order as described above.

However, with the above-mentioned electrode rearranging device, it must be transported suspended from a wire rope using a crane or the like, which makes the work dangerous as the bangers may shake during transport, and it is difficult to position the bangers, making the work difficult. There were problems such as the work taking a long time due to the small space.

The present invention has been made with the aim of eliminating the above-mentioned drawbacks of the conventional means, and is equipped with a cart that can move up and down between an entry frame and an exit frame in a direction perpendicular to the direction of strip movement. An elevating frame is provided, and on both sides of the elevating frame in the strip width direction, there are guide wheels arranged in double rows on each side with a required interval vertically and also with a required interval in the strip traveling direction. It is characterized in that bangers for supporting the electrodes are fitted between the upper and lower guide wheels in a set arrangement and move in opposite directions parallel to the strip traveling direction.

Embodiments of the present invention will be described below with reference to the drawings.

Between the entry frame 1 and the exit frame 2 in FIG.
Rails 13, 14 are provided that extend perpendicularly to the plane of the paper, and on the rails 13, 14 a trolley 1T of the electrode recombination device is mounted so that it can run via wheels 15, 16. .

Further, guide rollers 18 are installed on the cart 11 to prevent it from falling.

A vertical hydraulic cylinder 19 is disposed at a predetermined position in the longitudinal direction of the truck 17, and an elevating frame 20 is installed at the upper end of the hydraulic cylinder 19.

Further, a vertical outer cylinder 21 is installed on the trolley 17, and an inner cylinder 22 fixed to the lower surface of the lifting frame 20 is attached to the outer cylinder 21.
are slidably fitted.

The lifting frame 30 is in the strip width direction (truck running direction)
It has a long shape, and on both sides of the strip width,
brackets) 23 and 24 are attached.

A plurality of shafts 25 whose axes are parallel to the running direction of the bogie are attached to required positions above and below the brackets 23 and 24, and guide wheels 26 and 27 are rotatably mounted on the shafts 25, respectively. There is.

Between the guide wheels 26 and 26 is a banger 28 that can protrude toward the welding electrode on the inlet side, and between the guide wheels 27 and 27 is a banger 29 that can protrude toward the welding electrode on the outlet side, parallel to the strip running direction. The racks 30 and 31 are attached to the sides of the nozzles 28 and 29, respectively.

A shaft 36.31 to which a sprocket 32.33 and pinions 34, 35 are fixed is pivotally attached to the brackets 23, 24, and the pinions 34.35 are connected to the bangers 28.
It meshes with the rack 30°31 fixed to 29.

Electric motors 38 and 39 with brakes are disposed at required positions on the lifting frame 20, and shafts 42 and 43 are coupled to reduction gears 40 and 41 that can be driven by the electric motors 38 and 39, respectively. are connected via.

The shafts 42 and 43 are supported at their midpoints by bearings and extend toward the brackets 23 and 24.
Furthermore, the shafts 43 are pivotally attached to the brackets 24, respectively.

At the ends of these shafts 42, 43 there are sprockets 44° 4
An endless chain 46 is passed between the sprocket 44 and the sprocket 32, and an endless chain 41 is passed between the sprocket 46 and the sprocket 33.

The bangers 28 and 29 are each provided with a flat arm that is in contact with the lower surface of the lower welding electrode 10 and can integrally support the upper and lower welding electrodes 8 and 10. A tapered guide pin 48 that can be fitted into the lower hole of the lower welding electrode 10 is attached to the lower welding electrode 10 (see FIG. 6 for details).

In the figure, reference numeral 49 indicates a movable coupling part attached to the truck 11, and the same reference numerals as those shown in FIG. 1 indicate the same parts.

Next, the operation of the above-mentioned electrode changing device will be explained.

When exchanging the upper and lower welding electrodes 8 and 10 using the electrode changing device, as in the conventional case, widen the gap between the inlet frame 1 and the outlet frame 2 to an extent that allows the electrode changing device to be carried in, and replace the fluid pressure cylinder. 3 to lower the upper welding electrode 8, bring the upper welding electrode 8 into close contact with the lower welding electrode 10 as shown in the right half of FIG. Disengage the frame 7.9 and raise the clamp cylinder 6 by means of the hydraulic cylinder 3.

Then, the frame 1 also rises together with the clamp cylinder 6, but the upper welding electrode 8 remains on the lower welding electrode 10.

Although the upper welding electrode 10 and the frame 9 are not fixed, they maintain contact.

After the upper and lower welding electrodes 8, 10 are disengaged from the frame 7.9, the movable coupling part 49 of the carriage 17 of the electrode changing device is then pulled or pushed by a drive device such as a winch or a hydraulic cylinder. move the trolley 11 to the rail 13
, 14 and carry the electrode changing device into the welding device.

When carrying the electrode changing device into the welding equipment, the elevating frame 20 is in the lowest position, and the entrance frame 1 is
The banger 28 for supporting the welding electrode on the outlet frame 2 is located at the most downstream side in the strip traveling direction, and the banger 29 for supporting the welding electrode on the exit frame 2 is located at the furthest upstream side in the strip traveling direction. The positional relationship between the upper and lower welding electrodes 8, 10, frames 7.9 and bangers 2B, 29 when the electrode changing device is carried into the welding apparatus is shown in FIG. 9A.

After carrying the electrode changing device into the welding device, the electric motor 3B
, 39.

Then, the power is reduced by reducers 40, 41, shafts 42, 43,
The power is transmitted in this order to sprockets 44-45, chains 46, 47, sprockets 32-33, and pinions 34, 35, and the racks 30, 31 are driven by the pinions 34, 35.

Then, the bangers 28 and 29 are connected to the guide wheels 26 and 29, respectively.
26, 27 and 27 move forward in opposite directions, and the arms of the bangers 28 and 29 are positioned below the lower welding electrode 10 to be supported (see Figure 9).

Once the arm is in the required position, then the hydraulic cylinder 1
9 to raise the lifting frame 20 a little, and use the arm to lift the lower welding electrode 10 integrally with the upper welding electrode 8 to the extent that the upper surface of the upper welding electrode 8 does not come in contact with the lower surface of the frame 7. A slight gap is formed between the lower surface of frame 9 and the upper surface of frame 9 (see the opening in FIG. 9).

In this case, the head portion of the guide pin 48 is connected to the lower welding electrode 1.
0, and is positioned so that the lower welding electrode 10 does not slip on the arm.

When the upper and lower welding electrodes 8 and 10 rise together to a certain extent,
Next, the electric motors 3B and 39 are rotated in the opposite direction, and the bangers 28 and 2 are
9 to its original position between the guide wheels 26, 26.27°27, and shorten the distance e between the upstream welding electrode and the downstream welding electrode to an extent that does not interfere with the transport of the upper and lower welding electrodes 8°10. [Refer to Figure 9], the cart 11 is moved to transport the upper and lower welding electrodes 8 and 10 out of the welding apparatus, and then the electric motor 38 is moved again.
39 to move the bangers 28 and 29 in opposite directions (see Figure 9), and when the desired condition is reached, lift the upper and lower welding electrodes 8 and 10 with appropriate means such as a crane, and lift the bangers 28 and 29. Remove from.

When attaching a new welding electrode to the welding device, the steps can be performed in the reverse order to the above, so the explanation will be omitted.

In the embodiments of the present invention, the welding electrode is fixed to the frame using bolts, but the method is not limited to bolts. It goes without saying that various changes may be made within the scope of the invention without departing from the gist of the invention.

Since the electrode recombination device of the present invention has the above-described configuration,
Various effects can be achieved as described below.

(I) Since the banger can be positioned accurately, welding electrodes can be rearranged in a short time.

Therefore, the time required to stop the production line can be shortened, and productivity can be improved.

0 Workers do not have to perform dangerous work during rearrangement work, improving safety.

l Since each part can be operated by a fluid pressure cylinder or electric motor, remote automatic operation is possible.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of a welding device using the electrode recombination device of the present invention, Fig. 2 is an explanatory diagram of a conventional welding electrode recombination work, and Fig. 3 is an explanatory diagram of the electrode recombination device of the present invention. 4 is a left side view of FIG. 3, FIG. 5 is a plan view of the elevating frame portion of FIG. 3, and FIG. 6 is an enlarged view in the VI-VI direction of FIG. Fig. 1 is a detailed view of the banger attachment part in Fig. 3, Fig. 8 is a view taken from the ■-■ direction arrow in Fig. 1, and Figs. FIG. In the figure, 1 is the entrance frame, 2 is the exit frame, 8 is the upper welding electrode, 10 is the lower welding electrode, 11 is the trolley, 19 is the fluid pressure cylinder, 20 is the lifting frame, 26.27 is the guide wheel, 2B , 29 indicates a non-engineer, and 38.39 indicates an electric motor.

Claims (1)

[Claims] 1. A lifting frame that can be raised and lowered is provided on a trolley that can move in a direction perpendicular to the strip traveling direction between the entry side frame and the exit side frame. A plurality of sets of guide wheels are arranged so that their axes are oriented in the width direction of the strip, and the upper and lower guide wheels are arranged parallel to the direction in which the strip travels. An electrode recombination device characterized in that bangers for supporting electrodes that move in mutually opposite directions are inserted.