JPH0211358B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a strip connecting device that cuts the ends of a strip and performs laser beam welding or flash welding between the two ends.

[Prior art]

A conventional device of this type has been disclosed in Japanese Patent Application Laid-Open No. 52-61143, and generally had the configuration shown in FIG. This diagram is a schematic diagram of a steel process line. In order to pass the strip continuously,
It is necessary to connect the rear end of the leading strip 1a and the tip of the trailing strip 1b on the input side of the line.
Laser beam welding or flash welding has been used as a means for this, depending on the type of steel.

In the conventional type, a shearing device 3, a laser beam welding device 4, and a flash welding device 5 are individually installed between a payoff reel 2 for delivering the strip, a processing device 6, and a recoiler 7.

Next, the operation of the conventional device will be explained.

In the figure, when performing flash welding, the strips 1a and 1a fed from the payoff reel 2 are
The ends of each strip 1b are cut by a shearing device 3, and then the strips are transported to a flash welding position and welded.

On the other hand, in the case of laser beam welding, the strips 1a and 1b are transported to the laser beam welding device 4, the rear end and the leading end are cut respectively using a shearing device built into the welding device, and welded at that position. . Both welded strips 1a and 1b pass through a processing device 6 and are wound up by a recoiler 7.

Traditional strip connection devices are shearing devices,
Since the laser beam welding device and the flash welding device were installed separately, there was a drawback that the area occupied in the line direction was extremely large.

Modern steel process lines run many types of steel on the same line, but judging from the productivity standpoint, it is best to use laser beam welding for high carbon steel, silicon steel plates, etc., and flash welding for ordinary steel. good. In other words, with flash welding, ordinary steel is welded at high speed, and with special steel where the quality of the welded joint is a problem when flash welding is performed, laser beam welding, which takes longer welding time but produces a high quality joint, can achieve the highest productivity for the process line. Demonstrate your sexuality.

This invention was made in view of the above, and the first
~The third clamper, shear, laser beam welding device, and flash welding electrode are arranged on the same base, and the other strip is laser beam welded along the cutting line of one strip. Therefore, the present invention provides a strip connecting device that can greatly reduce the installation area and can also perform laser beam welding with high accuracy.

The figures will be explained below. In FIGS. 2 to 8, 1a and 1b are the same as the conventional one. 8 is a base, 9 is a frame provided on the base 8, and 10 is an upper metal fitting 10a and a lower metal fitting 1 provided on the base 8.
The upper metal fitting 10a can be moved in the vertical direction by the first clamper 0b. A cylinder 11 is fixed to the frame 9 and drives the upper metal fitting 10a. 1
Reference numeral 2 denotes a second clamper consisting of upper metal fittings 12a and 12b, which are provided on the base 8 so as to be movable toward or away from one end side of the first clamper 10, and the upper metal fitting 12a is movable in the vertical direction. .
13 is a cylinder provided on the base 8, and the upper metal fitting 1
Drive 2a. Reference numeral 14 denotes a cylinder provided on the base 8, which drives the second clamper 12 in the left-right direction toward the paper surface. Reference numeral 15 denotes an adjustment mechanism provided on the base 8 and driven by a cylinder 16, and is configured such that when it moves to the left, the top surface lowers, and when it moves to the right, the top surface rises. Reference numeral 17 denotes a rail provided on the upper surface of the adjustment mechanism 15, and is dependent on the vertical movement of the adjustment mechanism 15. 18 is the rail 17 via the wheel 19
A movable trolley placed on top allows it to be moved left and right on the page. Reference numeral 20 denotes an upper metal fitting 20b provided on the movable trolley 18 facing the other end of the first clamper 10.
The upper metal fitting 20a can be moved in the vertical direction by the third clamper. A cylinder 21 is fixed to the movable cart 18 and drives the upper metal fitting 20a. 2
2, 23 are conductors fixed to each upper metal fitting 10a, 20a; 24, 25 are inlet and outlet electrodes fixed to each upper metal fitting 10a, 20a electrically connected to each conductor 22, 23; 26 is a welding transformer provided on the upper metal fitting 10a of the first clamper 10, and one terminal is connected to the conductor 22. 27 is a tulip type contactor connected to the other terminal of the transformer 26; 28 is a tulip type contactor paired with the contactor 27 provided on the upper metal fitting 20a of the third clamper 20;
It is connected to the conductor 23 via 9. 30 is a cylinder for attaching and detaching both contactors 27 and 28, and is provided on the upper metal fitting 20a. 31 is mobile trolley 1
8 is a cylinder that drives the cylinder, 32 is a stop mechanism that determines the welding upset position, and 33 is a stop mechanism 3.
A stopper 34 that comes into contact with 2 is a shearing device consisting of an upper blade 34a and a lower blade 34b, which are provided on the frame 9 and the base 8, respectively. A cylinder 35 drives the shearing device 34 in the vertical direction, and is fixed to the frame 9. 36, 37 are side guide devices for centering each strip 1a, 1b, 38, 39 are each strip 1
an index clamper sandwiching a and 1b, 40;
41 is a cylinder that drives each index clamper 38, 39, and 42, 43 is a cylinder that drives each index clamper 38, 39 in a direction toward or away from each other. 44 is a rail provided on the base 8; 45 is a laser beam oscillator that runs on the rail 44 with wheels 46;
driven by. 48 is a laser beam transmission device, 49 is a laser beam processing head, 50 is a guide rail provided on the frame 9, 51 is a guide rail provided on the lower metal fitting 10b of the first clamper 10, and 52 and 53 are a pair of trimmers. The bits are connected to each other by brackets 54. 55 is a cylinder that drives both trimmer bits 52 and 53;
Reference numerals 56 and 57 designate lifting guides for the first clamper 10 and third clamper 20, and 58 represents a lifting guide for the shearing device 34.

Next, the operation will be explained. In FIGS. 2 to 8, the case of laser beam welding is as follows. That is, the rear ends and tips of the leading strip 1a and the trailing strip 1b are sheared by the shearing device 34, respectively.
Stop within the blade width of the side guide device 36, 3
Perform centering at step 7. After that, close the first clamper 10 and the second clamper 12,
Clamp and hold the strips 1a and 1b. Then, the shearing device 34 is operated to cut the strips 1a and 1b. When cutting is completed, the upper blade 34
A and the lower blade 34b are opened, and the shear device 34 is opened, and the second clamper 12 moves toward the first clamper 10, and the end faces of the leading strip 1a and the trailing strip 1b are welded together as required for welding. Matched with precision.

Along this cutting line, a laser beam processing head 49 is connected to a laser beam oscillation device 45 and a laser beam transmission device 4 from the rear surface in a direction intersecting the line.
8 and weld together.

When welding is completed, the laser beam processing head 4
9 begins to return to its original position, and at the same time both clampers 10 and 12 are opened and the strips 1a and 1b are
Sheet rolling has begun. When removing excess welding, the strip 1a is clamped and held by the outlet index clamper 38, and when the cylinder 55 is actuated, the first and third clampers 1
The welding part stops between 0 and 20, and the trimmer bit 5
It is also possible to perform excess cutting at 2.53.

Next, when performing flash welding, the process up to the cutting of the leading strip 1a and trailing strip 1b is the same as laser beam welding. The difference from laser beam welding is that the inlet index clamper 39 and the outlet index clamper 38 are each closed. That is, after cutting, the first clamper 10 and the second clamper 12 are each opened, and the leading strip 1a is clamped to the trailing strip 1 by the output side index clamper 38.
b is caused by the entry side index clamper 39,
After being conveyed to the respective flash welding positions, they are clamped and held by the third clamper 20 and the first clamper 10. And contactor 27,
28 are connected, and welding is performed while a current is applied from the welding transformer 26 and the movable cart 18 is sent. Welding feed of the movable cart 18 is controlled by a welding cylinder 31. The weld upset position is determined by an upset stop mechanism 32. After welding, the contactors 27 and 28 are opened, and the trimmer bits 52 and 53 are inserted between the first clamper 10 and the third clamper 20, and the trimmer cylinder 55 is operated at the welded position. Trim. When trimming is completed, the first and third clampers 10, 20 are opened to allow the strip to pass through.

In the above embodiment, the strip is cut by a guillotine shear, but the same effect can be obtained by cutting the strip by a laser beam. In addition, in the case of flash welding, it is necessary to set the extension allowance, but this can be easily done by arbitrarily controlling the position of the moving cart in the line direction and the amount of movement of the entry index clamper and exit index clamper. can be done.

In the above embodiment, the same effect can be expected even when the direction of threading of the line is reversed.

In the above embodiment, the welding transformer is housed above the strip, but it may also be placed below or on the exit side of the strip.

If the excess welding by laser beam is performed at the laser beam welding position, the effect of shortening the takt time can be obtained.

As described above, according to the present invention, the frame that supports the strip cutting function, the clamp function, and the load during flash welding, the shearing device, and the frame containing the first to third clamps is shared. The length in the line direction is extremely short, resulting in a compact complex device.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the entire conventional strip connecting device, FIG. 2 is a front view showing an embodiment of the present invention, FIG. 3 is a plan view of FIG. 2, and FIG. -A cross-sectional view of the line, Figure 5 is a front view of the trimming device, Figure 6 is the front view of Figure 5, Figure 7 is a side view of the laser beam welding device, and Figure 8 shows the main parts of Figure 2. FIG. In the figure, 1a and 1b are strips, 8 is a base, 10 is a first clamper,
12 is a second clamper, 18 is a moving cart, 20 is a third clamper, 24 is an inlet electrode (first electrode),
25 is an output side electrode (second electrode), and 45 is a laser beam oscillation device. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims (1)

[Claims] 1 a base, a first clamper disposed on the base for fixing one strip; a first clamper disposed opposite one end of the first clamper for fixing the other strip; a second clamper disposed on the base that is driven in the direction; a second clamper disposed on the base that is disposed between the two clampers to cut an end of the one strip and an end of the other strip; a shear, a laser beam welding device disposed on the base for welding the cut portions of both strips along the cut line of the one strip by the shear; a first electrode for flash welding that heats the end of the other strip; a first electrode disposed at the other end of the first clamper;
a movable carriage disposed on the base to be driven in the direction of the first clamper; a third movable carriage disposed on the movable carriage so as to face the other end of the first clamper and fixing the end of the one strip; A strip connecting device comprising a clamper and a second electrode for flash butt welding arranged on the third clamper opposite the first electrode and heating the end of one of the strips.