JPH0747225B2 - Electrode surface cleaning device for flash welder - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for cleaning the electrode surface of a flash welding machine.

[Conventional technology]

Flash welding in which two plate-shaped leading and trailing materials to be welded are held upside down by an upper electrode and a lower electrode in a state of being abutted against each other, and a flash is generated at the abutted portion for welding. In the machine, copper alloy is used for the upper electrode, but the lower electrode may come into contact with the material to be welded due to its own weight when it is being transported, and since it requires wear resistance, it is hardened steel and hardened. It uses a steel overlay.
However, the metal scattered from the material to be welded during welding is hard to adhere to the copper alloy having good thermal conductivity, but is likely to adhere to the steel having poor thermal conductivity than the copper alloy. For this reason, the metal is likely to adhere to the side surfaces of the lower electrode on both sides of butting. In order to reduce the adhesion of this metal, a copper alloy padding or a copper plate is attached to the side surface. However, it is necessary to use steel in the vicinity of the portion of the side surface of the lower electrode that comes into contact with the material to be welded in consideration of wear resistance, and metal scattered from the material to be welded is likely to adhere to this portion.

In order to remove the metal adhering to the electrode in this way, a device for cleaning the side surface of the electrode has been conventionally used.

FIG. 5 is a schematic front view of a flash welding machine equipped with a conventional electrode surface cleaning device, and FIG. 6 is a schematic partially omitted side view thereof.

In the figure, reference numerals 1 and 1 denote plate-shaped leading and trailing welded materials, and the welded materials 1 and 1 are abutted at their respective end surfaces, and the upper electrodes 2a, 2a and the lower electrodes 2b and 2b of a horizontal prismatic shape are arranged. The upper and lower electrodes 2a, 2a and the lower electrodes 2b, 2b are held in the vertical direction by the respective longitudinal side surfaces of 2b, the opposite ends thereof are butted, and the flash is generated at the butted portion by energizing the upper electrodes 2a, 2a and lower electrodes 2b, 2b. Weld materials 1 and 1 are welded.

In addition, reference numeral 3 in the drawing denotes a rotary
Before the flash welding is performed, the first shear blades 31 and 31 and the second shear blades 32 and 32 are used to adjust the shape of the abutting portions of the welded materials 1 and 1 and the end portions of the welded materials 1 and 1 are used. Cut from above and below. The first shear blades 31, 31 and the second shear blades 32, 32 are arranged at the rear end of the housing 33 of the rotary 3 and the opposite end is cut on the rear side. Cleaning tools 7, 7 having a blade 7a and having a rectangular shape in a side view are attached so that the cutting blade 7a abuts on the side surfaces of the lower electrodes 2b, 2b on the butt side of the materials to be welded 1, 1.

The rotary member 3 is mounted on a traveling table 4 that moves along a track 5 extending in the back direction in parallel with the abutting surface of the materials to be welded 1, 1 and moves along the track 5. While holding the end of the material to be welded to the upper electrodes 2a, 2a and the lower electrode 2
Cut along b and 2b.

In the process of flash welding, first, the upper electrodes 2a, 2a and the lower electrodes 2b, 2b hold the materials 1 and 1 to be welded, respectively, and the rotary shaft 3 is rotated in one direction indicated by a white arrow in FIG. Is moved along the track 5 and the ends of the materials to be welded 1 and 1 are cut to adjust the shape of the butt portion. Next, the materials to be welded 1 and 1 are butted and flash welded, and after the welding is completed, the upper electrodes 2a and 2a and the materials to be welded 1 and 1 are moved so as to be apart from the lower electrodes 2b and 2b by a predetermined distance in the upward direction. Then, the materials to be welded 1, 1 are released, the rotary shaft 3 is moved along the track 5 in the other direction opposite to the hollow arrow in FIG. 6, and returned to the position before the start of the cutting. To finish. In the process as described above, the cleaning tool
Simultaneously with the cutting of the materials to be welded 1, 7 and 7 cut the metal adhered to the lower electrodes 2b and 2b during the previous welding to clean the lower electrodes 2b and 2b.

In addition to the flash welding machine equipped with such an electrode surface cleaning device, there is an electrode cleaning device in which a cleaning tool is brought into contact with the electrode when the electrode releases the material to be welded. It is shown in the publication. Further, a flash butt welding apparatus equipped with a scraper for cleaning electrodes is shown in Japanese Utility Model Laid-Open No. 59-6072.

[Problems to be Solved by the Invention]

However, in the conventional device as described above, when the lower electrodes 2b, 2b are cleaned, the lower electrodes 2b, 2b are in contact with the materials to be welded 1, 1 and the lower electrodes 2b, 2b are to be welded. Material 1,1
In order to clean the vicinity of the part that contacts the
Cleaning tools 7,7 must be placed close to one. In this way, when the cleaning tools 7,7 are brought close to the materials to be welded 1,1 and there is a deformed portion such as a vertical bend in the materials to be welded 1,1 There is a risk that the tools 7 and 7 come into contact with each other and both are damaged. Further, the load related to the cutting of the cleaning tools 7,7 varies depending on the adhesion state of the metal adhering to the side surfaces of the lower electrodes 2b, 2b, but the load is the rotary tool 3 provided with the cleaning tools 7,7. Affect the movement speed of
There is a problem that the cutting accuracy of the materials to be welded 1 and 1 is adversely affected.

Further, the electrode cleaning device disclosed in Japanese Patent Publication No. 53-14504 is an operation in which each end of the preceding strip and the following strip is cut before welding the strip and the shear is inserted into the passage path of the strip. At the same time, by rotating the cleaning brush of the electrode cleaning device provided on the front side of the shear,
Since the welding spark sludge adhering to the welding machine electrode is cleaned, the welding spark sludge adhering to the welding machine electrode cannot be removed while it is still hot, and the welding spark sludge cannot be easily and completely removed. There is a problem. On the other hand, the flash butt welding machine disclosed in Japanese Utility Model Laid-Open No. 59-6072 scrapes off the welding spatter adhering to the electrode, and it is difficult to completely remove it, and the spatter is easily scraped in a hot state. There is a problem that you can not.

The present invention has been made in view of such circumstances, and when the electrode releases the material to be welded, the cleaning tool is moved along the side surface of the lower electrode and the metal attached to the lower electrode is still hot. It is an object of the present invention to provide an electrode surface cleaning device for a flash welding machine in which the material to be welded and the cleaning tool are not damaged and the cutting accuracy is good by adopting a configuration of cutting and cleaning with.

[Means for Solving the Problems]

The electrode surface cleaning device for a flash welding machine according to the present invention contacts the cleaning tool with the lower electrode when the traveling table moves in the other direction opposite to the direction in which the traveling table travels in one direction when cutting the material to be welded. It is installed on the traveling table so as to cut the metal attached to the lower electrode.

[Action]

When the traveling platform moves in the other direction opposite to the one direction when cutting, the welding is completed and each electrode releases the material to be welded, so the material to be welded is not attached to the lower electrode. Be in contact. In this case, if the cleaning tool is brought into contact with the lower electrode, the cleaning tool is not in contact with the material to be welded. The metal in the state is cut to clean the lower electrode.

〔Example〕

The present invention will be specifically described below with reference to the drawings showing an embodiment thereof. FIG. 1 is a schematic front view of a flash welding machine provided with an electrode surface cleaning device for a flash welding machine according to the present invention, and FIG. 2 is a schematic partially omitted side view thereof. 1, in the figure
Reference numeral 1 is a plate-like leading and trailing welded material.
1,1 are abutted at their ends, and the horizontal prismatic upper electrodes 2a, 2a made of copper alloy are arranged along the abutting surface and part of the horizontal prismatic copper alloy is hardened steel or hardened. The lower electrodes 2b and 2b having a steel padding are sandwiched and fixed in the vertical direction. Reference numeral 3 denotes a rotary, which has a shape in which both end portions of one long side of a rectangular shape in a side view are cut out.
In the vicinity of the long side not notched at both end corners of the first shear blades 31 and 31, which are interlocked and coupled by a first drive shaft (not shown), and second shear blades 32 which are interlocked and coupled by a second drive shaft (not shown). , 32 are provided so that their cutting edges face each other. Further, on one short side of the housing 33, a rotary member 3 having a through hole in the center thereof is provided.
A double-mount bracket 34 for rotation is formed.

Further, a track 5 extending in the back direction is provided below the abutting surface of the materials to be welded 1, 1 in parallel with the abutting surface, and on the orbit 5, the track 5 is penetrated into the inside thereof. A traveling platform 4 having a rectangular side view is provided which travels along a track 5 by a predetermined driving means. A mountain bracket 41 having a through hole in the center thereof is provided on the upper surface of the traveling table 4. And this single mountain bracket 41 and the double mountain bracket
By inserting the pin 6 through the through hole with 34, the rotary shaft 3 is mounted on the traveling table 4 so as to be rotatable about the pin 6 in the longitudinal direction of the traveling table 4. The rotary range of the rotary shear 3 is such that the direction in which the first shear blades 31, 31 and the second shear blades 32, 32 are arranged is parallel to the track 5, and the first shear blades 31, 31 and the second shear blades
From the position where the shear blades 32, 32 contact the upper surface of the traveling table 4, the first shear blades 31, 31 and the second shear blades 32,
An angle range of about 90 ° to the position where 32 is lined up is perpendicular to the orbit 5. And, the positional relationship between the materials to be welded 1, 1 and the first shear blades 31, 31 and the second shear blades 32, 32 is such that when the rotary shear 3 is inverted, that is, the lined-up direction as described above with respect to the track 5. In the case of the vertical position, the first shear blades 31, 31 and the second shear blades 32, 32 are in a positional relationship of sandwiching the materials to be welded 1, 1 from the vertical direction. Further, in the vicinity of the corner of the long side of the housing 33 where the first shear blades 31, 31 and the second shear blades 32, 32 are not provided, there is a cutting blade 7a on the side surface thereof, and the lower electrode 2b, Cleaning tools 7 and 7 for cutting the metal adhering to the butt surface side of the welded materials 1 and 1 of 2b are attached, and the cleaning tools 7 and 7 are shown by the solid line in FIG. As described above, when the rotary shear 3 is inverted, that is, when the direction in which the first shear blades 31, 31 and the second shear blades 32, 32 are aligned is perpendicular to the track 5, the cleaning tool 7 , 7 are provided at a predetermined distance from the materials to be welded 1, 1 and the lower electrodes 2b, 2b. When the rotary shear 3 is turned over as indicated by the chain line in FIG. 2, that is, the direction in which the first shear blades 31, 31 and the second shear blades 32, 32 are arranged is parallel to the track 5. In this case (shown by the one-dot chain line), the cleaning tools 7, 7 are provided so as to contact the side surfaces of the lower electrodes 2b, 2b.

Next, the operation of the flash welding machine as described above will be described.

When performing flash welding, the rotary shear 3 is turned upside down and is moved along the track 5 in one direction indicated by the white arrow in FIG. 2 while being moved along the orbit 5, the first shear blades 31, 31 and the second shear blades 32, 32. Thereby cutting the facing ends of the materials to be welded 1, 1 held by the upper electrodes 2a, 2a and the lower electrodes 2b, 2b, respectively, to determine the welding butt surfaces.

Next, after stopping the rotary 3, the ends of the materials to be welded 1 and 1 are butted against each other and flash welding is performed. FIG. 3 is a schematic diagram of the vicinity of the upper electrodes 2a, 2a and the lower electrodes 2b, 2b when performing flash welding. First, one welded material 1 held by the upper electrode 2a and the lower electrode 2b
Move in the direction of and abut each end. Then, when a voltage is applied between the upper electrodes 2a, 2a and one of the welded materials 1 is moved to the other welded material 1 side at a predetermined speed, flashing of the abutting portion occurs, and flash welding is performed. During this flash welding, metal adheres to the opposite side surfaces of the lower electrodes 2b, 2b.

When the flash welding is completed, the upper electrodes 2a, 2a and the lower electrodes 2b, 2b release the materials to be welded 1, 1, and the cleaning tools 7, 7 clean the side surfaces of the lower electrodes 2b, 2b. FIG. 4 is a schematic diagram of the vicinity of the upper electrodes 2a, 2a and the lower electrodes 2b, 2b at the time of cleaning the electrode surface after welding. After welding is completed, the upper electrode 2
The a and 2a are moved upward, and the material to be welded 1 is released.
Then, the material 1 to be welded is transferred by a transfer roll to move to the next process.
Lifted up by 8,8. As a result, the material 1 to be welded is brought into non-contact with the upper electrodes 2a, 2a and the lower electrodes 2b, 2b. Next, the clearance between the lower electrodes 2b, 2b is widened so that the rotary tool 3 can pass through the rotary tool 3, and the rotary tool 3 is turned over to make the cleaning tool attached to the rotary tool 3.
While contacting the side surfaces of the lower electrodes 2b, 2b facing 7, 7 and 7, the lower part of the welded material 1, 1 is moved in the other direction opposite to the hollow arrow in Fig. 2 to cut the welded material 1. Drive to the position before the start and return. During this traveling, the metal attached to the lower electrodes 2b, 2b during flash welding is cut by the cleaning tools 7, 7. Since the material to be welded 1 is not in contact with the lower electrodes 2b and 2b when the cleaning tools 7 and 7 are moved, the cleaning tools 7 and 7 do not come into contact with the material to be welded 1 and Electrode 2
The entire side surfaces including the vicinity of the surfaces of b and 2b that were in contact with the material to be welded 1 are cleaned by the cleaning tools 7 and 7.

Although the fixed cleaning tool is used in this embodiment, the invention is not limited to this, and a movable cleaning tool such as a rotary wire brush may be used.

〔The invention's effect〕

As described above in detail, in the electrode surface cleaning device of the flash welding machine according to the present invention, the upper electrode and the lower electrode release the material to be welded, and the traveling platform moves in the other direction opposite to the direction in which it moves in one direction during cutting. When moving to, the cleaning tool can be brought into contact with the end surface of the lower electrode to cut the still hot metal adhered to the lower electrode, and the metal adhered to the lower electrode can be easily and easily welded. Can be completely removed. In addition, the cleaning tool does not come into contact with the material to be welded and the cleaning tool and the material to be welded are not damaged, and the cutting accuracy is improved.

[Brief description of drawings]

FIG. 1 is a schematic front view of a flash welding machine equipped with an electrode surface cleaning device for a flash welding machine according to the present invention, FIG. 2 is a schematic partially omitted side view thereof, and FIG. 3 is a case of performing flash welding. Of the upper electrode and the lower electrode of Fig. 4, Fig. 4 is a schematic diagram of the vicinity of the upper electrode and the lower electrode when cleaning the electrode surface after welding, and Fig. 5 is a flash welding machine equipped with a conventional electrode surface cleaning device. 6 is a schematic front view and FIG. 6 is a schematic partially omitted side view thereof. 1 ... Material to be welded, 2a ... Upper electrode, 2b ... Lower electrode, 7
... Cleaning tool In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A preceding work material and a following work material are held by an upper electrode and a lower electrode, respectively, and when a traveling platform equipped with a rotary moves in one direction, both of them are moved by the rotary. After cutting the opposite ends of the material to be welded, flash welding is performed between the respective ends, and after the welding is completed, the electrode and both materials to be welded are separated from the lower electrode by a predetermined distance in the upward direction. The upper electrode and the lower electrode release both the materials to be welded, the rotary moves in the other direction below the materials to be welded, and the metal adhered to the lower electrode. In an electrode surface cleaning device of a flash welding machine for cutting with a cleaning tool, the cleaning tool contacts the lower electrode when the traveling table moves in the other direction and cuts the metal. Installed on the table An electrode surface cleaning device for a flash welding machine, which is characterized in that