JP2011045912A - Method and apparatus for joining metallic strip by welding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for joining metallic strips by welding, by which the tail end of a preceding metallic strip and the nose of a succeeding metallic strip are joined by welding linearly along the longitudinal direction of the metallic strips without bringing about the remarkable rising of the cost of equipment and the deterioration of quality. <P>SOLUTION: Metallic strip supporting rollers 16, 17 which are arranged on the outlet side of a welding machine 15 are tilted in the vertical direction by roller tilting mechanisms 20, 21, one side edge of the preceding metallic strip 13 is abutted on metallic strip positioning mechanisms 26, 27. In the state where the side edge of the preceding metallic strip 13 is positioned in a prescribed position by the metallic strip positioning mechanisms 26, 27, the tail end of the preceding metallic strip 13 and the nose of the succeeding metallic strip 14 are joined by welding. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for welding and joining a metal strip used when welding a tail end portion of a preceding metal strip and a tip end portion of a subsequent metal strip in a continuous treatment line of a metal strip such as a continuous hot dip galvanizing line The present invention relates to a metal band welding and joining apparatus.

  In continuous processing lines for metal strips such as continuous galvanizing lines that continuously galvanize steel strips and other metal strips, tension is applied to the bridle roll when the tail end of the preceding metal strip is removed from the payoff reel. 4 is shown in FIG. 4 when the tail end portion of the preceding metal strip meanders and the tail end portion of the preceding metal strip and the tip end portion of the following metal strip are welded and joined by a welding machine. As described above, the tail end portion of the preceding metal strip 13 and the tip end portion of the trailing metal strip 14 may be welded together in a U-shape. In this state, when the tail end portion of the preceding metal strip 13 and the tip end portion of the succeeding metal strip 14 are welded and joined, the weld joint portion between the preceding metal strip 13 and the succeeding metal strip 14 is large in the continuous processing line. When the tensile stress is locally generated, the welded joint may be broken and the line may be stopped.

  Therefore, as a technology to prevent so-called “bow welding” between the preceding metal strip and the trailing metal strip, the leading metal strip and the trailing metal strip are centered by a pinch roller with a centering function, and the “bow welding” is performed. Technology (see Patent Document 1), and a technology that prevents a “bow weld” by tilting a snubber roll that presses a preceding metal band against a bridle roll with respect to a vertical plane including the axis of the bridle roll (Patent Document) 2) is proposed.

JP-A-4-200917 JP-A-8-197138

  However, in the technique disclosed in Patent Document 1, the preceding metal band and the subsequent metal band are centered by a pinch roller with a centering function arranged before and after the welding machine for welding and joining the preceding metal band and the following metal band. Therefore, there is a problem that it cannot be applied when the space for arranging the pinch rollers cannot be secured before and after the welding machine. In addition, since the shape of the metal band changes unsteadily in the longitudinal direction, the shape change of the metal band is necessary to center the preceding metal band and the subsequent metal band by the pinch rollers arranged before and after the welding machine. Accordingly, it is necessary to control the nip pressure of the pinch roller. For this reason, the technique disclosed in Patent Document 1 requires a sensor for detecting a change in the shape of the metal band, a control means for controlling the nip pressure of the pinch roller, and the like, which causes a significant increase in equipment costs. . Furthermore, when the nip pressure is too strong, defects such as a roll pressing mark occur in the metal band, and there is a problem that the quality of the metal band is deteriorated.

  On the other hand, the technique disclosed in Patent Document 2 requires a meandering sensor for detecting meandering of a metal band generated upstream of the bridle roll in addition to the control means for controlling the tilting of the snubber roll. There is a drawback that it causes a significant rise. In addition, when the pressing force of the metal band by the snubber roll is too strong, defects such as a roll pressing mark or the like are generated in the metal band, and there is a disadvantage that the quality of the metal band is deteriorated.

  In addition, the side guides arranged before and after the welder are pressed against the side edges of the metal strip to forcibly center the leading metal strip and the trailing metal strip, and then the tail end portion of the leading metal strip and the trailing metal strip. The method of welding and joining the tip of the metal band is also common, but if the side guide is pressed firmly against the side edge of the metal band, if the metal band is thin, it will be applied to the side edge of the metal band. Because it breaks, it is not applicable to thin metal bands.

  The present invention has been made in view of the circumstances described above, and the tail end portion of the preceding metal strip and the leading end portion of the subsequent metal strip can be connected to each other without causing a significant increase in equipment cost or quality deterioration. It is an object of the present invention to provide a metal band welding and joining method and a metal band welding and joining device capable of being welded and joined linearly along a direction.

  In order to solve the above-mentioned problems, the metal band welding and joining method according to the present invention is such that a tail end portion of a preceding metal strip and a tip end portion of a succeeding metal strip which are paid out from a payoff reel are welded and joined by a welding machine. A metal band support roll disposed on the outlet side of the welder is tilted in the vertical direction by a roll tilt mechanism to bring one side edge of the preceding metal band into contact with the metal band positioning mechanism, The tail end portion of the preceding metal strip and the tip end portion of the succeeding metal strip are weld-joined in a state where one side edge portion of the preceding metal strip is positioned at a predetermined position by the metal strip positioning mechanism. To do.

  In the welding joining method of the metal strip according to the present invention, the tail end of the preceding metal strip is detected by the tail end detector disposed on the entry side of the welder, and the tail end output from the tail end detector The roll tilt mechanism may be operated based on a detection signal. Further, at least two metal band supporting rolls arranged on the exit side of the welding machine are tilted in the vertical direction by the roll tilting mechanism, and one side edge of the preceding metal band is brought into contact with the metal band positioning mechanism. You may let them.

Further, the metal band positioning mechanism has a plurality of positioning pins or saddle-shaped rolls, and one side edge portion of the preceding metal band is brought into contact with the plurality of positioning pins or saddle-shaped rolls. You may weld-join a tail end part and the front-end | tip part of the said subsequent metal strip.
The metal band welding and joining apparatus according to the present invention includes a welding machine that welds and joins the tail end portion of the preceding metal strip and the tip end portion of the following metal strip that are paid out from the payoff reel, and the tail of the preceding metal strip. A metal band welding and joining apparatus comprising: a metal band positioning device that positions the preceding metal band in a width direction when an end and a leading end of the subsequent metal band are welded and joined by the welding machine; A roll tilt mechanism in which the metal band positioning device tilts the metal band support roll disposed on the outlet side of the welder in the vertical direction, and a preceding metal band on the metal band support roll tilted in the vertical direction by the roll tilt mechanism. And a metal band positioning mechanism that engages with one of the side edges to position the preceding metal band in the width direction.

  In the metal band welding joining apparatus according to the present invention, the roll tilting mechanism may tilt at least two metal band support rolls arranged on the outlet side of the welding machine in the vertical direction. The metal band positioning mechanism may have a plurality of positioning pins or saddle type rolls that engage with one side edge of the preceding metal band. Furthermore, the metal band positioning mechanism may be movable in the axial direction of the metal band support roll.

  According to the present invention, the tail end portion of the preceding metal strip and the tip end portion of the succeeding metal strip are formed in a dogleg shape without requiring a sensor for detecting a change in the shape of the metal strip or a meandering sensor for detecting the meander of the metal strip. It is possible to prevent welding and joining to the metal, and defects such as side edge folds and roll pressing marks do not occur in the metal strip, so there is no significant increase in equipment costs or quality deterioration. The tail end portion of the band and the tip end portion of the succeeding metal band can be welded in a straight line along the longitudinal direction of the metal band.

It is a figure which shows one Embodiment which applied the metal strip welding joining apparatus which concerns on this invention to the continuous hot-dip galvanization line. It is a figure which shows the structure of the roll tilting mechanism in one Embodiment of this invention. It is a figure which shows the structure of the metal band positioning mechanism in one Embodiment of this invention. It is a figure which shows the state by which the tail end part of the preceding metal strip and the front-end | tip part of a succeeding metal strip were weld-joined in the shape of a dogleg.

Hereinafter, a metal band welding and joining method and a metal band welding and joining apparatus according to the present invention will be described with reference to the drawings.
FIG. 1 shows an embodiment in which a metal band metal band welding and joining apparatus according to the present invention is applied to a continuous hot dip galvanizing line. The continuous hot-dip galvanizing line shown in FIG. 1 has payoff reels 11 and 12. Of these payoff reels 11 and 12, for example, the preceding metal strip 13 paid out from the payoff reel 11 has passed through a welder 15. Thereafter, the metal strip support rolls 16 and 17 disposed on the exit side of the welding machine 15 are transported to the bridle rolls 18 and 19 while being supported on the lower surface, and tension is applied by the bridle rolls 18 and 19. ing. The preceding metal strip 13 applied with tension by the bridle rolls 18 and 19 is conveyed to an annealing furnace (not shown) through an entry side louver (not shown). On the other hand, the tip end portion of the trailing metal strip 14 paid out from the payoff reel 12 is welded to the tail end portion of the preceding metal strip 13 by a welding machine 15. The welding machine 16 may be a general welding machine used for metal band welding, such as a flash butt welding machine or a narrow wrap seam welding machine.

  The metal band support rolls 16 and 17 are supported by the roll tilt mechanisms 20 and 21 shown in FIG. These roll tilting mechanisms 20 and 21 each have a roll support 22 that rotatably supports the metal band support rolls 16 and 17 and a support 23 that horizontally supports the roll support 22. The roll tilting mechanisms 20 and 21 each include a support shaft 24 that supports the roll support 22 so as to be rotatable in the vertical direction, and a cylinder 25 that swings and drives the roll support 22 in the vertical direction around the support shaft 24. The metal band support rolls 16 and 17 are inclined in the vertical direction by operating the cylinder 25.

When the metal band support rolls 16 and 17 are tilted to the state shown in FIG. 2B by the operation of the roll tilting mechanisms 20 and 21, the metal band itself is supported on the lower surface by the metal band support rolls 16 and 17. Due to its own weight, its one side edge comes into contact with the metal band positioning mechanisms 26 and 27 shown in FIG.
The metal band positioning mechanisms 26 and 27 have positioning pins 28 and 29, respectively, and one side edge of the preceding metal band 13 abuts against these positioning pins 28 and 29, so that the center line of the preceding metal band 13 is a metal. The belt support rolls 16 and 17 are positioned at the center in the axial direction. A saddle type roll may be used in place of the positioning pins 28 and 29. The metal band positioning mechanisms 26 and 27 each have a movable base 30 that vertically supports the positioning pins 28 and 29, and the movable base 30 corresponds to the width of the preceding metal band 13 and the metal band support rolls 16 and 17. It can move in the axial direction.

  The cylinders 25 of the roll tilt mechanisms 20 and 21 are actuated by signals from the control device 31 shown in FIG. The control device 31 drives and controls the welding machine 15 and the roll tilting mechanisms 20 and 21, and a tail end detector 32 (see FIG. 1) arranged on the entry side of the welding machine 15 includes a tail of the preceding metal strip. An end portion is detected, and when a tail end detection signal S1 is output from the tail end detector 32, a roll tilt signal S2 for tilting the metal band support rolls 16 and 17 is sent to the roll tilt mechanisms 20 and 21. Has been.

  Further, when a predetermined time elapses after the control device 31 sends the roll inclination signal S2, one side edge of the preceding metal strip 13 comes into contact with the positioning pins 28 and 29 of the metal strip positioning mechanisms 26 and 27. The welding command signal S <b> 2 for welding and joining the tail end portion of the preceding metal strip 13 and the tip end portion of the following metal strip 14 is sent to the welding machine 15.

  As described above, in one embodiment of the present invention, the metal band support rolls 16 and 17 disposed on the exit side of the welding machine 15 are tilted in the vertical direction by the roll tilt mechanisms 20 and 21, and one of the preceding metal bands 13 is tilted. The side edge is brought into contact with the metal band positioning mechanisms 26 and 27 disposed between the welding machine 15 and the metal band support roll 17, and one side edge of the preceding metal band 13 is contacted with the metal band positioning mechanisms 26 and 27. A sensor for detecting a change in the shape of the metal band as in the prior art described above by welding the tail end of the preceding metal band 13 and the tip of the subsequent metal band 14 in a state where the metal band is positioned at a predetermined position. In addition, it is possible to prevent the tail end portion of the preceding metal strip 13 and the tip end portion of the following metal strip 14 from being welded and joined in a U-shape without the need for a meandering sensor or the like for detecting the meandering of the metal strip. Defects such as marks occur in the metal band Nor. Further, the contact of the metal band to the metal band positioning mechanisms 26 and 27 is a soft contact due to the weight of the metal band itself, so that the side edge portion of the side guide is not bent. The present invention can also be applied to thin metal bands (for example, plate thickness of 1.0 mm or less) that are difficult to apply. Therefore, the tail end portion of the preceding metal strip 13 and the tip end portion of the succeeding metal strip 14 are welded in a straight line along the longitudinal direction of the metal strip without causing a significant increase in equipment cost or quality deterioration. Can do.

  Further, the tail end portion of the preceding metal strip 13 is detected by the tail end detector 32 disposed on the entrance side of the welding machine 15, and the roll tilt mechanism 20 is based on the tail end detection signal output from the tail end detector 32. , 21 can be actuated so that the roll tilting mechanisms 20, 21 can be actuated before the tail end of the preceding metal strip 13 passes through the welding machine 15. The side edge near the end can be brought into contact with the metal band positioning mechanisms 26 and 27.

  Further, the roll tilting mechanisms 20 and 21 for tilting at least two metal band support rolls 16 and 17 in the vertical direction are operated, and one side edge portion of the preceding metal band 13 is brought into contact with the plurality of positioning pins 28 and 29. By doing so, the tail end portion of the preceding metal strip 13 is more reliably parallel to the transport direction, and the force acting on the side edge portion of the metal strip is dispersed to prevent breakage, leading to quality deterioration. And can be prevented from being welded and joined in a U-shape.

Further, as the metal band positioning mechanism for positioning one side edge portion of the preceding metal band 13, the metal band positioning mechanisms 26 and 27 that are movable in the axial direction of the metal band support rolls 16 and 17 are used. The positions of the positioning pins 28 and 29 can be changed in accordance with the width dimension of the.
In addition, in one Embodiment of this invention mentioned above, although one Embodiment which applied this invention to the continuous hot-dip galvanization line was illustrated, it is not restricted to this, The tail end part of a preceding steel strip, and a post-following Of course, the present invention can be applied to all facilities having a welding machine that welds and joins the tip of the end.

  DESCRIPTION OF SYMBOLS 11,12 ... Pay-off reel, 13 ... Lead metal strip, 14 ... Subsequent metal strip, 15 ... Welding machine, 16, 17 ... Metal strip support roll, 18, 19 ... Bridle roll, 20, 21 ... Roll tilt mechanism, 22 DESCRIPTION OF SYMBOLS ... Roll support, 23 ... Support | pillar, 24 ... Support shaft, 25 ... Cylinder, 26, 27 ... Metal band positioning mechanism, 28, 29 ... Positioning pin, 30 ... Movable stand, 31 ... Control device, 32 ... Tail end detector

Claims (8)

  A method for welding and joining a tail end portion of a preceding metal strip and a tip end portion of a succeeding metal strip, which are paid out from a payoff reel, using a welding machine, the metal strip support roll disposed on the exit side of the welding machine Is tilted up and down by a roll tilting mechanism so that one side edge of the preceding metal band is brought into contact with the metal band positioning mechanism, and one side edge of the preceding metal band is brought to a predetermined position by the metal band positioning mechanism. A metal band welding / joining method comprising welding the tail end portion of the preceding metal strip and the tip end portion of the succeeding metal strip in a positioned state.   2. The method for welding and joining metal strips according to claim 1, wherein a tail end portion of the preceding metal strip is detected by a tail end detector disposed on an entry side of the welder and output from the tail end detector. A metal band welding and joining method, wherein the roll tilting mechanism is operated based on an end detection signal.   3. The method for welding and joining metal strips according to claim 1 or 2, wherein at least two metal strip support rolls arranged on the outlet side of the welder are tilted in the vertical direction by the roll tilting mechanism and the preceding metal strip. One side edge part of this is contact | abutted to the said metal band positioning mechanism, The welding joining method of the metal band characterized by the above-mentioned.   4. The metal band welding and joining method according to claim 1, wherein the metal band positioning mechanism includes a plurality of positioning pins or saddle-shaped rolls, and the preceding positioning pins or saddle-shaped rolls are preceded by the preceding. A method of welding and joining metal bands, wherein one side edge of the metal band is brought into contact with the tail end part of the preceding metal band and the tip part of the succeeding metal band.   A welding machine that welds and joins the tail end portion of the preceding metal strip and the tip end portion of the following metal strip, which are paid out from the payoff reel, and the tail end portion of the preceding metal strip and the tip end portion of the following metal strip. A metal band welding and joining apparatus comprising: a metal band positioning device for positioning the preceding metal band in a width direction when welding and joining by the welder, wherein the metal band positioning device is provided on the outlet side of the welder. A roll tilting mechanism for tilting the metal band support roll disposed in the vertical direction, and one of the preceding metal bands on the metal band support roll tilted in the vertical direction by the roll tilting mechanism to engage with the preceding edge A metal band welding and joining apparatus comprising: a metal band positioning mechanism for positioning the metal band in the width direction.   6. The metal band welding and joining apparatus according to claim 5, wherein the roll tilting mechanism tilts at least two metal band supporting rolls arranged on the outlet side of the welding machine in the vertical direction. Welding equipment.   The metal band welding and joining apparatus according to claim 5 or 6, wherein the metal band positioning mechanism has a plurality of positioning pins or saddle type rolls that engage with one side edge of the preceding metal band. Metal band welding joint device.   The metal band welding joining apparatus according to any one of claims 5 to 7, wherein the metal band positioning mechanism is movable in an axial direction of the metal band supporting roll.

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