JP2000084695A - Continuous welding method in longitudinal direction of beltlike steel plate and its welding equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To butt each other without clearance so as to surely weld by transferring adjacent plural beltlike steel plates in different transfer angles in parallel, converging both steel plates to the same plane while guiding a non-welding side of a steel plate of one side and continuously butting a welding side of other steel plate to a welding side of one of a steel plate. SOLUTION: Beltlike steel plates 11, 12 are gradually approached from a state apart up/down by transfer devices (roll) 9a-9f. In the beltlike steel plates 11, 12, the non-welding sides are respectively guided by a longitudinal roller type first guide device 12 and a second guide device 14, and the side ends of beltlike steel plates 11, 12 are butted in the same plane. Butted parts are restricted by a pass restriction device 10 to prevent position deviation, deformation and are continuously welded by a laser beam welding machine 3. It is preferable to weld by following and/or weaving a welding torch of the laser beam machine 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a facility for continuously welding a steel strip in the longitudinal direction by, for example, laser welding. In particular, when steel sheets of different types (thickness, material, etc.) are used for adjacent parts, such as an automobile body, a joining blank capable of integrally forming these parts is required. The present invention relates to a blank material obtained by joining such steel sheets of different steel types, or a wide strip steel sheet made of the same or different strip steel sheets.
The present invention relates to a method and apparatus for continuously welding strip-shaped steel sheets in the longitudinal direction, which can be manufactured inexpensively and with high productivity by continuously welding strip-shaped steel sheets having more than one strip in the longitudinal direction.

[0002]

2. Description of the Related Art In order to produce the above-mentioned joint blank material, there is a method of welding strip-shaped steel plates (sheets) to each other. In this method, there is known a method in which side edges of a sheet are arranged in abutting manner, tightened to eliminate a gap in the abutting portion, and a welding machine is moved along the abutting edge during welding.

[0003] In addition, there is also a method of welding strip-shaped steel sheets to each other. In this method, both the strip-shaped steel sheet and the welding machine are moved. However, since the strip-shaped steel sheet cannot be conveyed continuously through the welding equipment, welding is performed. Length is limited by the travel of the welder. As described above, in the conventional technology, the strip-shaped steel sheets cannot be continuously welded in the longitudinal direction, and in the production of a joining blank material for an automobile, welding can be performed only with a sheet, which leads to an increase in cost and production. The nature had to be low.

In recent years, various improvements have been made, and
As disclosed in Japanese Patent No. 3153, the welding machine is fixed, and the belt-like steel plate is conveyed in a state where the side ends of the steel plate are abutted to the welding position, thereby continuously welding the steel belt with a laser beam. A conveying and guiding method is disclosed. That is, as shown in FIGS. 25 and 26, the side ends of the strip-shaped steel plates a and b are adjacent to each other, and one of the side ends is brought into contact with the guide surface in the same vertical plane and is arranged next to each other. A method of conveying and guiding a strip-shaped steel sheet to be sent to a welded portion while being brought into close contact with each other on the same conveying surface in a horizontal plane on separate conveying surfaces inclined at an acute angle is disclosed.

In this method, the side edges of the respective strip-shaped steel sheets which are conveyed vertically apart are pushed in by a slanted conveying roller and a vertical roller, and the side ends on the welding side are brought into the same vertical position. Transported by contacting the guide surface on the surface,
The side edges of the strip are converged by the grip roll and butted against each other, but the side edges may not be perfectly straight.When converging on the grip roll, the gap may be widened, or the side edges may shrink. As a result, it is difficult to stably secure a good welded portion, and it is hardly sufficient from the viewpoint of ensuring stable welding accuracy. In addition, since two or more strips of steel sheet are welded in the longitudinal direction, for example, three or more strips of different or the same type cannot be continuously welded, they are made of three or more strips of different or the same type. It is hard to say that it is sufficient from the viewpoint of producing a wide strip steel plate at low cost and high productivity.

[0006]

DISCLOSURE OF THE INVENTION The present invention advantageously solves the above-mentioned problems when continuously welding strip-shaped steel sheets in the longitudinal direction, so that the welded side ends of the strip-shaped steel sheets can be welded without gaps. A continuous welding method capable of butt-reliably welding and a continuous welding facility for performing the continuous welding method are provided, and continuous welding in the longitudinal direction is performed for two or more strips of the same or different kind, for example, three to four strips. Accordingly, it is possible to provide a wide-width strip-shaped steel sheet of good quality at low cost and with high productivity.

[0007]

The present invention provides the following (1).
To (25). (1). A method for continuously welding two or more strip steel plates in which the side edges of strip steel plates adjacent in the width direction are butted and the butted portion is continuously welded in the longitudinal direction, wherein the first strip steel plate and the second strip steel sheet adjacent in the width direction are joined together. When the steel plates are conveyed in parallel at different conveyance angles and the respective conveyance surfaces converge so as to be flush with each other immediately before the welding position, the side end position of one of the strip-shaped steel plates on the non-welding side is guided. After converging on the same plane, the side end of the other strip-shaped steel sheet on the welding side is continuously butted against the side end of the one strip-shaped steel sheet on the welding side, and the butted portion is continuously welded. Longitudinal continuous welding method.

(2). A method for continuously welding three or more strip-shaped steel sheets, in which side edges of strip-shaped steel sheets adjacent in the width direction are butted, and this butt portion is continuously welded in the longitudinal direction, wherein the first strip-shaped steel sheet and the second strip-shaped steel sheet are adjacent in the width direction. When the steel plates are conveyed in parallel at different conveyance angles and the respective conveyance surfaces converge so as to be flush with each other immediately before the welding position, the side end position of one of the strip-shaped steel plates on the non-welding side is guided. After being converged on the same plane, the welded side end of the other strip-shaped steel plate is continuously butted against the welded side end of the one strip-shaped steel plate, and the butted portion is continuously welded. In the subsequent stage of the first welding device, the first band-shaped steel plate obtained by welding in the third band-shaped steel plate adjacent in the width direction to the welding band-shaped steel plate consisting of the second band-shaped steel plate, in parallel conveyance at different conveyance angles, When converging each conveying surface to be on the same plane immediately before the welding position, guide the side end position on the opposite side of the welding strip to converge on the same plane, and then weld the third strip. A continuous welding method in the longitudinal direction of a strip-shaped steel sheet, characterized in that the side end of the strip-shaped steel sheet is continuously butted against the side end of the welded strip-shaped steel sheet on the welding side, and the butted portion is continuously welded.

(3). A method for continuously welding three or more strip-shaped steel sheets, in which side edges of strip-shaped steel sheets adjacent in the width direction are butted, and this butt portion is continuously welded in the longitudinal direction, wherein the first strip-shaped steel sheet and the second strip-shaped steel sheet are adjacent in the width direction. When the steel plates are conveyed in parallel at different conveyance angles and the respective conveyance surfaces converge so as to be flush with each other immediately before the welding position, the side end position of one of the strip-shaped steel plates on the non-welding side is guided. After being converged on the same plane, the welded side end of the other strip-shaped steel plate is continuously butted against the welded side end of the one strip-shaped steel plate, and the butted portion is continuously welded. In the subsequent stage of the first welding device, the first band-shaped steel plate obtained by welding in the third band-shaped steel plate adjacent in the width direction to the welding band-shaped steel plate consisting of the second band-shaped steel plate, in parallel conveyance at different conveyance angles, When converging each conveying surface to be on the same plane immediately before the welding position, guide the side end position of the third strip-shaped steel sheet on the non-welding side and converge on the same plane before welding the welded strip-shaped steel sheet. Continuous welding in the longitudinal direction of the strip-shaped steel sheet, wherein the side end of the strip-shaped steel sheet is continuously butted against the side end of the third strip-shaped steel sheet on the welding side, and the butted portion is continuously welded.

(4). In (3), before the welding strip steel sheet consisting of the first strip steel sheet and the second strip steel sheet is conveyed in parallel with the third strip steel sheet, and before the respective conveying surfaces converge so as to be on the same plane immediately before the welding position. A continuous welding method in the longitudinal direction of a strip steel plate, wherein a thrust force separating roll separates a thrust force in a width direction of the welding strip steel sheet before and after the thrust force separating roll. (5). In any one of (2) to (4), after welding the first strip-shaped steel sheet and the second strip-shaped steel sheet, the welded strip-shaped steel sheet including the first strip-shaped steel sheet and the second strip-shaped steel sheet at the same position in the width direction within 20 seconds. And a third strip-shaped steel sheet is welded to the strip-shaped steel sheet.

(6). A method for simultaneous continuous welding of three or more strip-shaped steel sheets, in which side edges of strip-shaped steel sheets adjacent in the width direction are butted, and this butt portion is continuously welded in the longitudinal direction.
When three or more strip-shaped steel sheets adjacent in the width direction are conveyed in parallel at different conveyance angles between adjacent strip-shaped steel sheets, and when the respective conveyance surfaces converge so as to be on the same plane immediately before the welding position, After guiding the side end position on the anti-welding side of either one of the strip-shaped steel sheets on both sides and converging on the same plane,
A method for continuous welding in the longitudinal direction of a strip-shaped steel sheet, characterized in that the welding-side end of an adjacent strip-shaped steel sheet is continuously butted against the welding side of the guided strip-shaped steel sheet, and this butted portion is continuously welded simultaneously.

(7). In any one of (1) to (6), when welding a butt portion, a welding device is fitted to the butt portion, and a welding torch of the welding device is followed or / and
And a method of continuous welding in the longitudinal direction of a strip-shaped steel sheet, which is performed by weaving and welding. (8). In any one of (1) to (7), a method for continuous welding in the longitudinal direction of a strip-shaped steel sheet is performed by winding the strip-shaped steel sheet adjacent to one another in the width direction in parallel when the strip-shaped steel sheet is conveyed in parallel. (9). In any one of (1) to (8), at least one of the first strip-shaped steel sheet, the second strip-shaped steel sheet, and the third strip-shaped steel sheet is a welded strip-shaped steel sheet including two or more strip-shaped steel sheets. A continuous welding method in the longitudinal direction of a steel sheet. (10). (1) The method according to any one of (1) to (9), wherein the path is constrained at the convergence position or downstream thereof when the transfer surface converges on the same plane. (11). In (10), when the path is constrained at a position where the conveying surface converges on the same plane or at a downstream side thereof, a thrust force is applied to the strip-shaped steel sheet in a direction perpendicular to the traveling direction thereof to shift the sheet. Characteristic continuous welding method in the longitudinal direction of strip steel plate. (12). (10) or (11), wherein the guide device is disposed before and after the path restraining position, and when the path is restrained, the guide device disposed forward and backward guides the non-welded side of the strip steel plate. Continuous welding method in the longitudinal direction.

(13). A continuous welding facility for two or more strip steel plates that abuts the side ends of the strip steel plates adjacent in the width direction and continuously welds the butted portions in the longitudinal direction, wherein the first strip steel plate and the second strip steel sheet that are adjacent in the width direction. Conveying the steel sheets in parallel at different conveying angles, converging immediately before the welding position, and a conveying device having a convergence function to make the conveying surface of the first strip steel sheet and the second strip steel sheet the same plane, and one of the strip steel sheets A guide device for guiding the side end position on the anti-welding side, a guide device for abutting the welding side end of the other strip steel plate to the welding side end of one strip steel plate, a first strip steel plate and a second strip shape A continuous welding facility in the longitudinal direction of a strip-shaped steel plate, comprising a welding device for welding a butt portion of a steel plate.

(14) A continuous welding facility for three or more strip-shaped steel sheets, which abuts side ends of the strip-shaped steel sheets adjacent in the width direction and continuously welds the butted portions in the longitudinal direction, wherein the first steel sheet is adjacent in the width direction. A conveying device having a convergence function of conveying the belt-shaped steel sheet and the second belt-shaped steel sheet in parallel at different conveyance angles, converging immediately before the welding position, and making the conveyance surface of the first band-shaped steel sheet and the second band-shaped steel sheet the same plane, A guide device for guiding the side end position of the one strip-shaped steel plate on the non-welding side, a guide device for abutting the welded side end of the other strip-shaped steel plate to the welded side end of the one strip-shaped steel plate, A first welding process including a first welding device for welding a butt portion between the strip-shaped steel plate and the second strip-shaped steel plate; Adjacent in the width direction to the welded strip A conveying device having a converging function that conveys the third steel strip in parallel at different conveying angles and converges just before the welding position to make the conveying surfaces of the welding steel strip and the third steel strip coplanar, A guide device for guiding the side end position on the welding side, a guiding device for abutting the welding side end of the third strip steel plate to the welding side end of the welding strip steel plate, and a butting of the third strip steel plate and the welding strip steel plate A continuous welding facility in the longitudinal direction of a strip-shaped steel plate, comprising a second welding step including a second welding device for welding a part.

(15) A continuous welding facility for three or more strip-shaped steel plates, which abuts side ends of the strip-shaped steel plates adjacent in the width direction and continuously welds the butted portions in the longitudinal direction, wherein the first steel plate is adjacent in the width direction. A conveying device having a convergence function of conveying the belt-shaped steel sheet and the second belt-shaped steel sheet in parallel at different conveyance angles, converging immediately before the welding position, and making the conveyance surface of the first band-shaped steel sheet and the second band-shaped steel sheet the same plane, A guide device for guiding the side end position of the one strip-shaped steel plate on the non-welding side, a guide device for abutting the welded side end of the other strip-shaped steel plate to the welded side end of the one strip-shaped steel plate, A first welding process including a first welding device for welding a butt portion between the strip-shaped steel plate and the second strip-shaped steel plate; Adjacent in the width direction to the welded strip The third belt-shaped steel sheet is conveyed in parallel at different conveyance angles, converged immediately before the welding position, and has a converging function of converging the welding belt-shaped steel sheet and the third belt-shaped steel sheet on the same plane, and a third belt-shaped steel sheet. A guide device for guiding the side end position of the non-weld side, a guide device for abutting the weld side end of the welded strip to the side end of the third strip steel plate, and a butt portion of the welded strip steel plate and the third strip steel plate. A continuous welding facility in the longitudinal direction of a strip-shaped steel plate, comprising a second welding step including a second welding device for welding.

(16). In (15), before the convergence position of the first and second strip-shaped steel sheets obtained in the first welding step and the third strip-shaped steel sheet, a thrust force in the width direction of the welded strip-shaped steel sheet is applied. A continuous welding equipment in the longitudinal direction of a strip-shaped steel sheet, wherein a thrust force separating roll for separating the steel sheet is disposed. (17). (14) In any one of (16) to (16), the second welding device is disposed at a distance of 5 m or less behind the first welding device, and is a continuous welding equipment in the longitudinal direction of the strip-shaped steel plate.

(18). A continuous welding facility for simultaneously welding three or more strip-shaped steel sheets in which the side edges of the strip-shaped steel sheets adjacent in the width direction are butt-jointed and the butt portion is continuously welded in the longitudinal direction, wherein three or more strip-shaped steel sheets adjacent in the width direction are simultaneously welded. Steel sheet,
A conveying device that conveys each adjacent strip-shaped steel sheet in parallel at a different conveying angle, a path restraining device that constrains each conveying surface to be in the same plane immediately before the welding position, and guides a side end position of the strip-shaped steel sheet. A continuous welding equipment in the longitudinal direction of a strip-shaped steel sheet, comprising a guide device and two welding devices for welding two butted portions at the same time.

(19). (13) In any one of (13) to (18), the welding device includes a position adjusting mechanism in a width direction of the strip-shaped steel plate, and the welding torch includes a follow-up mechanism for a butt portion and / or a weaving mechanism. A continuous welding method in the longitudinal direction of a strip steel plate. (20). (13) In any one of (13) to (19), the conveying device that conveys the strip steel sheet adjacent in the width direction in parallel includes a winding roll that winds and conveys the strip steel sheet. Direction continuous welding method. (21). (13) The continuous welding equipment in the longitudinal direction of a strip-shaped steel sheet according to (20), wherein the path restraining device is arranged at a position where the conveying surface converges on the same plane or at a downstream side thereof.

(22). (21) The continuous welding equipment in the longitudinal direction of a strip-shaped steel sheet, wherein the path restraining device includes a mechanism for applying a thrust force to the strip-shaped steel sheet in a direction perpendicular to the traveling direction. (23). In (22), the mechanism for applying a thrust force to the strip-shaped steel sheet in a direction perpendicular to the traveling direction is one of a mechanism that makes the angle variable with respect to the traveling direction and a pressing mechanism that makes the pressing force variable in the sheet width direction. Or a continuous welding equipment for a strip-shaped steel plate in the longitudinal direction, wherein the both are both. (24). (21) to (23), continuous welding equipment in the longitudinal direction of the strip-shaped steel sheet, wherein a guide device for guiding the non-weld side of the strip-shaped steel sheet is disposed before and after the path restraining device. (25). (13) In any one of (13) to (24), at least the guide device that presses the strip-shaped steel sheet against the guide device side that guides the side end position on the non-welding side has a strip-side steel plate side end pressing mechanism. Characteristic continuous welding equipment for strip-shaped steel plates in the longitudinal direction.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, when one strip-shaped steel sheet and the other strip-shaped steel sheet to be welded are conveyed in parallel on conveyance planes having different angles, and the respective conveyance planes converge on the same plane, A guide device guides the side end of one strip-shaped steel sheet on the non-weld side, and presses the welded side end of the other strip-shaped steel sheet against the welded side end of the other strip-shaped steel sheet to form a welded side end. Butt is easily and surely but without gaps, and the path is constrained. Then, the welding device is continuously welded to the butt, and a good weld is stably secured without causing the problems as in the conventional method described above. Is possible.

Hereinafter, the present invention will be described in detail.
In the present invention, in a state where the side edge on the non-welding side of one strip-shaped steel sheet is guided, the welding side edge of the other strip-shaped steel sheet abuts on the welding side edge of the one strip steel sheet. Because the part (weld position) differs for each size of the steel strip,
In this case, the welding device is continuously welded in accordance with the butt portion. In this case, the welding torch of the welding device is followed or / and weaved so as to cope with a variation in the plate width and a variation in the position of the side end. I have. In particular, even in the case of continuously welding a welded strip made of two or more strips having a size change, the position adjustment of the guide device for the other strip is performed with reference to the side edge of the other strip on the side opposite to the welding side. Therefore, installation and operation of the guide device are simple, and it is possible to easily cope with continuous welding of three or more strip-shaped steel plates.

According to the present invention, continuous welding of three or more strip steel plates is easily possible as well as continuous welding of two strip steel plates. For example, by conveying three or more strip-shaped steel sheets in parallel, 2
It is also possible to obtain a welded strip steel plate composed of three or more strip-shaped steel sheets by simultaneously and continuously welding in the longitudinal direction by more than one welding device. Further, for example, one or both of one strip steel plate and the other strip steel plate are welded strip steel plates consisting of two strip steel plates welded in the longitudinal direction in advance, and are continuously welded in the longitudinal direction to form three or four strip steel plates. A wide-width welded steel sheet made of a strip-shaped steel sheet can be obtained.

In addition, the three or more strip-shaped steel sheets can be continuously welded in the longitudinal direction by the first welding step and the second welding step, which are continuous steps. In this case, for example, in the first welding step, the first strip-shaped steel sheet and the second strip-shaped steel sheet are continuously welded in the longitudinal direction to form a welded strip-shaped steel sheet composed of two strips of steel sheet, and the second stripped steel sheet is subjected to the second welding step. It is possible to continuously weld three strip-shaped steel sheets in the longitudinal direction to obtain a wide-width welded strip-shaped steel sheet composed of three strip-shaped steel sheets.

[0024] In this manner, the first strip steel plate and the second strip steel plate are welded by the first welding device in the first welding process, and the first strip steel plate and the second strip steel plate are welded by the second welding device in the second welding process. If the time difference between the welding in the first welding device and the welding in the second welding device is large when welding the welded strip steel plate and the third belt-shaped steel plate, During that time, the plate shape changes in the course of the welding heat distortion and the subsequent cooling process, and when welding is performed by the second welding device, a displacement may occur at the butted portion, making welding difficult. Such a phenomenon is remarkable especially in the case of a thin strip steel plate. In order to prevent the occurrence of such inconvenient phenomena, it is effective to minimize the time difference between the welding by the first welding device and the welding by the second welding device. (Within 20 seconds), the first welding device and the second welding device are positioned in consideration of the conveying speed, the progress of the change of the plate shape is made small, and good welding with the second welding device is possible. And It is also effective as a measure for the displacement of the butted portion to use the side edge of the non-welded strip-shaped steel plate that has not been deformed by welding as a standard for the second welding process.

In the present invention, when one of the two strip-shaped steel sheets to be welded converges on the same plane as the conveying surface of the one strip-shaped steel sheet, the side end on the side opposite to the welding side is guided by the guide device. It is transported while guiding on the surface. In this case, in order to make this guide more secure, another guide device is arranged on the welding side at a position that does not hinder the conveyance of the other strip-shaped steel sheet, and one of the strip-shaped steel sheets is placed on the guide surface from the welding side. Pressing is also effective. The other strip-shaped steel sheet that is continuously welded in the longitudinal direction with the one strip-shaped steel sheet is conveyed in parallel on a conveyance surface having a different angle from the conveyance surface of the one strip-shaped steel plate, and the respective conveyance surfaces are flush with each other immediately before the welding position. And conveyed in parallel with one strip-shaped steel sheet. Since one strip steel sheet and the other strip steel sheet up to the convergence position are conveyed on a conveyance surface separated by an angle α, the guide device for one strip steel sheet is arranged so as not to hinder the conveyance of the other strip steel sheet. be able to.

In addition, there is no interference between the side ends of one strip-shaped steel plate and the other strip-shaped steel plate during transportation to the convergence position, so that damage and deformation between the side ends can be avoided. When the conveying surface of one strip-shaped steel sheet and the other strip-shaped steel sheet are converged on the same plane, the side end of the other strip-shaped steel sheet on the non-welding side is pressed by a guide device having a pushing function, and the other strip-shaped steel sheet is pressed. The welded side end of the steel sheet is continuously butted against the welded side end of one of the strip-shaped steel sheets without any gap.
In a state where the path is restricted by the path restricting device arranged immediately after the convergence position, the welding device is made to follow the position of the butt portion, and the butt portion is continuously welded. In this way, two or more strips of the same or different types, the same thickness or different thicknesses, are butt-joined without gaps with reference to the side end position of one of the strips on the side opposite to the welding side. Can be stably performed in the longitudinal direction, and a wide band-shaped welded steel sheet can be obtained with high productivity by welding two or more strips of good quality in the longitudinal direction.

In the continuous welding equipment of the present invention, for example, when two strip steel plates are welded, two transfer devices for forming a transfer surface at a different angle between one strip steel plate and the other strip steel plate to be welded are provided. This conveying device has a convergence function, in which one strip-shaped steel plate and the other strip-shaped steel plate are conveyed away from each other, and each conveying surface is arranged so as to converge on the same plane in front of the welding device. Things. As this transporting device, a roll is preferably used, and by providing a tilting mechanism for this roll, if the transport roll center axis can be tilted, one strip-shaped steel plate is brought closer to the guide device side on the non-welding side. It can also have a boarding function. Also,
This roll may be of a so-called pinch roll type that sandwiches the strip-shaped steel sheet from above and below.

In the case where the thickness of the strip-shaped steel plate to be welded is different, when the welding is performed with the upper surfaces (front surfaces) coincident, the conveyance and convergence are performed so that the upper surfaces coincide, and the lower surfaces (rear surfaces) are coincident. In the case of welding, the wafers are conveyed so that the lower surfaces are aligned and converged. Since this transfer can be performed without interruption by a processing operation in the welding equipment, continuous welding of an arbitrary length in the longitudinal direction is possible according to the length of the strip-shaped steel plate to be welded. In addition, the guide device for guiding one strip-shaped steel sheet only guides one strip-shaped steel sheet, and is arranged on a transfer surface different in angle from the transfer surface of the other strip-shaped steel sheet, so that sufficient installation is possible. Space can be secured. As the guide device, a guide device having a guide surface formed by a straight edge or a vertical roller can be used. In order to more reliably guide the side end position of the one strip-shaped steel sheet on the side opposite to the welding side, it is effective to arrange another guiding device on the welding side.

The guide device arranged on the welding side is provided with a pressing mechanism for pressing the guide device for guiding the side end position of one strip-shaped steel sheet on the side opposite to the welding side, so as not to interfere with the other strip-shaped steel plate. The one strip-shaped steel sheet and the other strip-shaped steel sheet are arranged in front of a converging position where the conveying surface is vertically separated. As the guide device, a guide device having a guide surface formed by a straight edge or a vertical roller can be used.

The guide device arranged on the side opposite to the welding side of the other strip-shaped steel sheet is preferably provided with a pressing mechanism. Installed before and after. As the guide device, for example, a linear edge or a vertical roller or the like provided with a side end pushing mechanism of a strip-shaped steel plate can be used. Depending on the structure of the path restraining device described later, the guide device is disposed after the path restraining device. It is effective. By the guide device having the pressing mechanism described above, the welded side end of one strip-shaped steel sheet and the welded side end of the other strip-shaped steel sheet can be more reliably butted against each other without any gap, and the path can be restrained. Good continuous welding is possible. The guide device provided with the above-described pressing mechanism is not limited to the side-end pressing type, and may be a device that is pressed by a roll or a pinch roll.

In this manner, one strip-shaped steel sheet and the other strip-shaped steel sheet are butted, and a welding device is positioned at the butted portion to perform continuous welding. In this case, stable welding is performed by preventing displacement and deformation. In order to carry out the above, it is preferable that one band-shaped steel plate and the other band-shaped steel plate are path-constrained at the time of welding. A path restraining device for this purpose is disposed between the guide device and the welding device on the side opposite to the welding side of the other strip-shaped steel plate, and the one strip-shaped steel plate and the other strip-shaped steel plate butted by the guide device are conveyed. Stable welding is enabled by restricting the path as much as possible.

As the path restricting device, a roll or a pressing body is used. For example, when a roll is used, it is not necessarily required to be a driving roll and may be an idle roll. Strip steel plate,
It is preferable to arrange a pair of rolls so as to restrain the path on the front and back sides, so that a light pressing force can be applied to one of the band-shaped steel plates and the other band-shaped steel plate to be restrained.

When the strip-shaped steel sheet has a meandering tendency, the path restraint device is inclined in the traveling direction, and the meandering of the strip-shaped steel sheet progresses, and the convergence accuracy and the butting accuracy may be reduced. It is effective to arrange the device also on the exit side of the path restraining device to more reliably guide the device.

In the path restraining device, a mechanism for applying a thrust force in a direction perpendicular to the traveling direction, for example, so as to allow the belt-like steel plate to be moved (correct meandering and stabilize convergence) when the path is restrained, for example, It is effective to provide a mechanism for inclining at an angle β with respect to the traveling direction, and a reduction mechanism for varying the pressing force (path restraining force) in the plate width direction. further,
In particular, in the case of a thin strip-shaped steel sheet, it is effective to wind the sheet around a roll as a means for ensuring path constraint.

The welding device is arranged so that welding can be performed with the path restrained by the path restraining device. In principle, the welding device is disposed immediately after the path restraining device. Since it is better to have a smaller, it is also effective to incorporate a welding device in the path restraining device or to incorporate a path restraining device in the welding device.

As a welding device, a laser beam welding machine using a CO ₂ , YAG laser beam, which can perform welding at a higher speed than other welding means and has a wide application range even in welding between dissimilar materials, is preferable. A non-contact type welding machine capable of supplying a heat source, such as a plasma welding machine or a plasma-assisted laser beam welding machine, can also be used.

The welding position by the welding device is a butt portion, but the position of the butt portion may fluctuate. Therefore, the position of the butt portion is detected before the welding device, and the position of the butt portion is determined in accordance with the position of the butt portion. It is preferable to use one equipped with a welding device (welding head) and a mechanism for following a welding torch.

Further, since a small gap may be formed in the butted portion, in order to stably maintain the welding accuracy, for example, when a laser beam welding apparatus is used,
It is more effective to provide a laser beam weaving mechanism and to use the following mechanism and the weaving mechanism alone or in combination depending on the condition of the butted portion.

In order to carry out the welding according to the present invention with higher precision, a monitoring device for checking the butting condition of the welded side edges of one strip-shaped steel plate and the other strip-shaped steel plate and the welding result is provided by the above-mentioned path restraining device. It is effective that the guide devices are arranged before and after to enable fine adjustment of each guide device and fine adjustment of the welding position based on the monitoring result.

In the case where the present invention is applied, the conveying surface of each strip-shaped steel sheet is mainly a horizontal conveying surface in the width direction, but may be a vertical conveying surface or an inclined conveying surface. In the longitudinal direction, in the process of reaching the convergence device, one of the one strip-shaped steel sheet and the other strip-shaped steel sheet at least partially forms an inclined conveyance surface, and after the convergence position, in the width direction. The horizontal transport surface is the mainstream, but may be a vertical transport surface or an inclined transport surface.

[0041]

(Embodiment 1) Embodiment 1 of the present invention will be described with reference to FIGS. In this embodiment, the strip steel plates to be welded are two strip steel plates of different steel types and the same thickness, and these two strip steel plates are continuously welded in the longitudinal direction by a welding device (here, a laser beam welding machine). This shows a case where a welded strip steel sheet composed of two strip steel sheets of different steel types is continuously obtained. Figure 1 is a drawing showing an example of a longitudinal continuous welding equipment steel strip according to the invention, this example, the steel strip 1 ₁ 2 Article mounted in the uncoiler 2 _1, 2 ₂ coiled, 1 ₂ butt solved, the butt portion, the laser beam welder 3, welding the steel strip 1a made of a strip-shaped steel plate 1 _1, 1 ₂ and longitudinally welded
It is configured to cut by the delivery shear 4 to manufacture the welded steel plate 1c.

This will be described in more detail with reference to FIGS.
You. 2 strip steel plate 1₁And 1_TwoAre located vertically apart
An Uncoiler 2₁, 2 _TwoUnwound from each
It is led to the inlet shears 6a, 6b via the outlet devices 5a, 5b.
He cut the defective part of the head and shaped it with levelers 7a and 7b.
After the shape is corrected, it passes through free loops 8a and 8b,
Steel plate 1₁Are transported by the transport rollers 9a, 9b, 9c.
Steel strip 1_TwoBy the transport rollers 9d, 9e, 9f
And gradually approach each other from the state of being separated vertically
Of the path restraining device 10 comprising a pair of rolls 10a, 10u
Immediately before, strip steel sheet 1₁, 1_TwoForm an acute angle α between the transfer surfaces
And converge on the same plane without overlapping
Are transported in parallel.

In this parallel transport process, the strip steel plate ₁₁
a is a guide surface 12a of a vertical roller type first guide device 12 provided with an advance / retreat mechanism 11 provided on the upstream side of the convergence position as shown in FIG. You. In this case, as shown in FIG. 4 (b), another guide device 13 is disposed on the side end side of the strip-shaped steel plate _{11 on} the welding side.
It is also effective to guide the strip-shaped steel plate 1 ₁ is pressed against the guide device side of the counter-welding side counter-welding side of the side end more reliably.

On the other hand, the steel strip 1 _2, the guide surface 14a of the vertical roller type second guide device 14 having a reciprocating mechanism 15 as shown in FIG. 5 which is provided on the counter-welding side immediately after the convergence position
By pressing the non-welding side of the steel sheet, the side edge of the welding side is pressed against the side edge of the strip-shaped steel sheet _{11 on} the welding side. Immediately after the convergence position, the side edge of the strip-shaped steel sheet _{11 and} the welding side are pressed. side edge of the steel plate 1 ₂ for welding side is matched in the same plane. In this state, the path restraint device 10 disposed immediately after is restrained under tension, as shown in FIG. 6, to prevent displacement and deformation of the welding-side side ends, and to prevent the path restraint device 10 from being deformed. The continuous welding W is performed in the longitudinal direction by the laser beam welding machine 3 arranged immediately after. The laser beam welding machine 3 has a weaving mechanism (not shown).

[0045] Prior to welding, the butted portion of the side end and the steel strip 1 ₂ steel strip 1 ₁ welded-side is detected by the position detection sensor 25, the position of the welding head 3o of the laser beam welder 3 by the detection information There is controlled by tracking control mechanism (not shown), the butted portion of the steel strip 1 ₁ and the steel strip 1 ₂ is reliably welded, a welding strip made of a strip-shaped steel plate 1 ₁ and the steel strip 1 ₂ as shown in FIG. 7 As shown in FIG. 1, the steel plate 1a is continuously obtained, measured to a predetermined length by the delivery shear 4, and loaded on the pallet 24 as the welded steel plate 1c.

The first guide device 12 includes:
In addition to the roller, a sliding linear edge, guide fence, etc. can be used. In the case of a guide fence or sliding linear edge, the burrs on the side edges of the strip are smoothed by friction and abutted. Accuracy can be further improved. In this way, two strips of the same or different types, the same thickness or different thicknesses, butted against the side end position of one of the strips on the side opposite to the welding side without forming a gap, and butt of the strips. Continuous welding in the longitudinal direction can be stably performed, and a welded steel plate 1c can be obtained with high productivity by welding two or more high-quality strip-shaped steel plates in the longitudinal direction.

(Embodiment 2) FIGS. 8 to 12 show Embodiment 2 of the present invention. In this embodiment, the strip steel plates to be welded are three strip steel plates of different steel types and the same thickness.
In the two welding processes of the first welding process and the second welding process, three welding strips of different steel types are continuously welded in the longitudinal direction by a welding device (here, a first laser beam welding machine, a second laser beam welding machine). This shows a case where a welded steel sheet made of a steel sheet is continuously obtained.

In this example, two strip-shaped steel plates 1 ₁ , 1 ₂ mounted in a coil shape on the decoilers 2 ₁ , 2 ₂ are unbutted and joined, and in the first welding step Aw, the butted portions are joined by the first welding device 3 _1. a first welding step Aw with a steel strip 1 ₁
And welding the steel strip 1a made of a strip-shaped steel plate 1 _1, 1 ₂ continuously welded longitudinally steel strip 1 ₂ by the first laser beam welder 3 ₁ and leads to the second welding step Bw, welding steel strip 1a , the uncoiler 2 ₃ in the coiled butt by solving the steel strip 1 ₃ mounted, the butt portion in the second welding step Bw second laser beam welder 3 ₂
Longitudinally continuous welding, of Article 3 the steel strip 1 ₁ by,
1 _2, 1 ₃ and a strip welded steel 1b made of, which is constituted as to cut at the outlet side shear 4 to produce a weld steel plates 1c.

Since the first welding step Aw is basically the same as the welding apparatus 3 of the first embodiment shown in FIGS. 1 to 7, detailed description is omitted, and the second welding step Aw is omitted. The welding process will be described in detail. Welding in the first welding process Aw (W
welding steel strip 1a made of a strip-shaped steel plate 1 ₁ and the steel strip 1 ₂ is a), the second welding step B following the first welding process
w.

The welded strip-shaped steel sheet 1a from the first welding step transported to the second welding step Bw passes through the free loop 16 and is transported by the transport rollers 17a, 17b, 17c, and the welded strip-shaped steel sheet 1a and the longitudinal the steel strip 1 ₃ consecutive welding direction is solved Karakara uncoiler 2 _3,
After being guided to the entrance-side shear 6c through the exit device 5c, the defective portion of the head is cut and the shape is corrected by the leveler 7c, the transport rollers 17d, 17e, and 1 pass through the free loop 8c.
By 7f, it is conveyed in parallel with the welded strip steel plate 1a.

[0051] At this time, the conveying surface of the welded steel strip 1a, the conveying surface of the steel strip 1 _3, as shown in FIG. 9, FIG. 10, an acute angle α is formed between the conveying surface from the spaced upper and lower positions As described above, it gradually approaches without overlapping, and converges in the same plane immediately before the path restraining device 18 composed of a pair of upper and lower rolls. In this parallel conveying process, the side end of the welding strip-shaped steel plate 1a on the side opposite to the welding side is a vertical roll type third guide device 20 having an advance / retreat mechanism 19 provided upstream of the convergence position.
Is guided in contact with the guide surface 20a. Here, on the opposite side of the third guide device 20, another vertical roller type guide device 21 having an advance / retreat mechanism 19 is arranged so as to oppose, and presses the welded side end of the welded strip steel plate 1a to perform welding. The side end of the strip-shaped steel plate 1a on the non-welding side is guided to the guide surface 20 of the third guide device 20.
The guide is pressed against a.

[0052] Further, the side edge of the welded side of the steel strip 1 _3, in the convergence position, the steel strip by the guide surface 23a of the vertical roll-type fourth guide device 23 having a forward and reverse mechanism 22 provided in the counter-welding side 1 by the side end of the counter-welding side ₃ is pressed, welded pressed against the side edge of the welded side of the steel strip 1a, above convergence position, the welding of the welded side of the steel strip 1a side edge and the steel strip 1 ₃ The side ends on the welding side are continuously butted in the same plane. In this state, by the path constraining device 18 disposed immediately after the path constrained as shown in FIG. 11 under tension, displacement of the side edge between the welding side of the steel strip 1 ₃ welded steel strip 1a is prevented .

The welded strip steel thus path-constrained
Side edge of plate 1a on the welding side and strip steel plate 1 _ThreeOf the welding side of the end
Butt is located immediately after path restraint 18
Second laser beam welding machine 3_TwoContinuous welding in the longitudinal direction
(Wb) As shown in FIG.₁And obi
Steel plate 1_TwoStrip steel plate 1a and strip steel plate 1 made of_ThreeOr
A wide welded strip steel plate 1b is obtained.
Is measured to a predetermined length to form a wide welded steel plate 1c.
Pallet 24.

The third guide device 20 can be, for example, the same as the first guide device 12 shown in FIG. 4A of the first embodiment, and another guide device 21 is the first guide device 21. An alternative guide device 13 shown in FIG. 4b of the embodiment can be used. Also, the fourth guide device 23
For example, a device similar to the second guide device shown in FIG. 5 of the first embodiment can be used. Path restraint device 1
8 and the laser beam welding machines 3 ₁ and 3 ₂ can be basically the same as the path restraining device 10 and the laser beam welding machine 3 shown in the first embodiment.

In the second embodiment, as described above,
Three different types of strip-shaped steel sheet 1₁, 1 _Two, 1_ThreeWide
The first welding process Aw and the second
By the contacting step Bw, it can be obtained continuously.

(Third Embodiment) FIGS. 13 to 15 show a third embodiment of the present invention. This embodiment is different from the first embodiment in that, as shown in FIG. 13, a different path restraining device 26 is arranged in place of the path restraining device 10, and the path restraining device and the exit side of the laser beam welding machine 3 are arranged. In that a side guide 27 for guiding the side edge of the strip-shaped steel sheet on the side opposite to the welding side is provided, and the operation effect of the path restraining device 26 and the side guide 27 is different. In this example, the path constraining device 26, placed after the position for converging the steel strip 1 ₁ and 1 ₂ of the conveying surface in the same plane, this path constraining device 26
And a side guide 2 on the exit side of the laser beam welding machine 3
7 are arranged.

[0057] At this time, the steel strip 1 _first transport plane, the conveying surface of the steel strip 1 ₂ is, as shown in FIG. 13, FIG. 14, an acute angle α is formed between the conveying surface from the spaced upper and lower positions As described above, it gradually approaches without overlapping, and converges in the same plane immediately before the path restraining device 26 including the pair of upper and lower rolls 26o and 26u. In this parallel transport process, the side ends of the counter-welding side of the steel strip 1 ₁ is guided in contact with the guide surface of the guide device 12 provided on the upstream side of the convergence position. Furthermore, the counter-welding side of the steel strip 1 _2, another guiding device 1
4 are arranged at the side edge of the steel strip 1 ₂ welding side butt presses the side edge of the steel strip 1 ₁ welding side, the steel strip 1 ₁ anti-welding side guide apparatus side end of the 12 The guide is pressed against the guide surface to ensure guidance.

The path restraining device 26 used here
As shown in FIG. 14, a pair of upper and lower rolls 26o, 2o
The upper roll 26o is provided with a pressing mechanism 28 that changes the width of the strip steel plate in the width direction in order to apply a thrust force to the upper roll 26o in the direction perpendicular to the traveling direction of the strip steel sheet. Is provided with an inclination mechanism 29 with respect to the traveling direction.

Further, a restraining device 26 and a side guide 27 serving as a guide device disposed on the exit side of the laser welding machine 3.
Is provided with an advance / retreat mechanism 30 and has a strip-shaped steel plate ₁₁ ,
It is preferably disposed on the both sides so that it can guide the side edges of the 1 ₂ anti welding side. However, this side guide 27
Both sides may function simultaneously, but strip steel plates 1 ₁ , 1 ₂
Often tends to one or the other, so that in practice, either one often functions.

For example, when the belt-shaped steel plates 1 ₁ , 1 ₂ are constrained in a meandering state, the plate shifts in either direction, so that the butting is not performed smoothly and the butting accuracy is deteriorated. As shown in FIG. 15, the pressing force by the upper roll 26o of the path restraining device 26 is changed by the pressing mechanism 28 in the plate width direction.
The upper and lower rolls 26 are tilted by the tilting mechanism 29 of 6o and 26u.
The roll axes o and 26b are inclined at an angle β in the advancing direction to apply a thrust force in a direction perpendicular to the advancing direction of the strip-shaped steel plate.

As described above, the path restraining device 26 also has a plate shifting function by controlling the thrust force in the vertical direction and the advancing direction in the direction of the plate width in accordance with the direction of the plate deviation and the degree of the plate deviation. the side edge of the counter-welding side of the steel plate 1 ₁ between the guiding device 12 and the side guides 27, and more reliably guided, stably secure the convergence and butt accuracy, stably improved path restraining function of path restraining device Can be done. In this example, the upper and lower rolls 26o and 26u of the path restricting device 26 are shown as integral rolls, but may be divided rolls and provided with a pressing down mechanism 28 and a tilting mechanism 29, respectively.

Although not shown here, for example, a load cell for detecting the thrust force in the vertical direction and the traveling direction is disposed, and the thrust force applied by the pressing mechanism 28 and the tilting mechanism 29 is controlled according to the detected thrust force. It is effective to do.

Fourth Embodiment FIGS. 16 to 18 show a fourth embodiment of the present invention. This embodiment is basically the same manner as in Example 1, butt solving the uncoiler 2 _1, 2 ₂ 2 Article mounted in the coiled steel strip 1 _1, 1 _2, the butt portion, laser The beam welder 3 welds in the longitudinal direction to form a welded strip steel plate 1a composed of the strip steel plates 1 ₁ and 1 ₂ , and cuts it with the delivery shear 4 to manufacture a welded steel plate 1c. But,
Here, the steel strip ₁ 1, 1 ₂ to be welded has a thickness of 1.
4 mm, 0.8 mm thin strip-shaped steel plate, with low rigidity, it is difficult to guide the side end position by the guide device in a normal transport state, and the strip-shaped steel plates 1 ₁ , 1 ₂ are precisely placed on the same plane. In some cases, it may be difficult to securely restrain with the restraint device 10 by abutting.

Therefore, in the fourth embodiment, the restraining device 10 consisting of a pair of upper and lower rolls 10o and 10u
A guide device 12 having a plurality of deflector rolls 31, 32 a, and 32 b disposed thereon and wound around a lower roll 10 u of the restraint device 10 under a predetermined tension to increase rigidity and to have an advancing / retracting mechanism 11 on the entry side of the restraint device 10. In addition, the guide by the guide device 14 having the advance / retreat mechanism 15 is assured to ensure sufficient matching accuracy, and the restraining device 10 can reliably restrain the path. Here, the restraint device 1
A side guide (guiding device) 27 having an advancing / retracting mechanism 30 is also arranged on the exit side of 0 to further ensure path restriction.

(Embodiment 5) FIGS. 19 to 21 show the present invention.
This shows a fifth embodiment. In this embodiment, the welding target
Are made of different materials and have the same thickness of 0.6 mm.
3 strips of thick steel plate, 2 laser beam welding
Continuous welding in the longitudinal direction by the
Welded steel plate consisting of strip-shaped steel plate in one welding process
This shows the case where it is obtained. In Example 2, the first solution
Strip steel plate 1₁And strip steel plate 1_TwoFirst, weld
In the second welding step, the welded strip steel sheet 1a is used.
Strip steel plate 1 on plate 1a _ThreeBy welding three strips of steel sheet
1₁, 1_Two, 1_ThreeTo obtain a strip-shaped welded steel plate 1b consisting of
However, in the fifth embodiment, the decoiler 2₁, 2
_Two, 2_ThreeStrip-shaped steel plate mounted in coil form
1₁, 1_Two, 1_ThreeSolve and match, laser beam
In the welding machine 3a, the strip-shaped steel sheet 1₁And strip steel plate 1_TwoMatch of
The welding part is strip-shaped steel sheet 1 by laser beam welding machine 3b._TwoWhen
Strip steel plate 1_ThreeButtings are simultaneously continuous in the longitudinal direction
Welded strip steel plate 1₁, 1_Two, 1_ThreeWelded strip steel consisting of
The plate 1b is cut by the output shear 4 to produce a welded steel plate 1c.
It is configured to be manufactured.

More specifically, the uncoiler 2 ₁ ,
3 strip steel plates 1 mounted in coils 2 ₂ and 2 _3
1, 1 _2, 1 ₃ by solving, is guided to the inlet side Shah 6a~6c through the yarn end finding device bodies 5a to 5c, after being straightening in leveler 7a~7c cut defects of the head, the free loop 8a~ through 8c, the steel strip ₁ 1 via a deflector roll 31, 1 _2, 1 _3, 32a, 32 b, are parallel transported through 32c, guide device provided with a reciprocating mechanism 12,1
The laser beam welding machines 3a and 3b incorporated in the path restraining device 10 simultaneously butt the butt portions while being guided by 4, 23, and 27, converged on the same plane, and butted by the path restraining device 10. Continuous welding is performed to form a welded strip steel plate 1b composed of _three strips of steel strips 1 ₁ , 1 ₂ , and 13 of different materials, which is cut by the output shear 4 and stored in the pallet 24 as a welded steel plate 1 c. It is what was constituted.

In the fifth embodiment, too, since a thin strip-shaped steel plate is to be welded, the rigidity is low similarly to the fourth embodiment, so that the side end position can be guided by the guide device in a normal transport state. Difficult, strip steel plates 1 ₁ , 1 ₂ , 1
_In some cases, it may be difficult to accurately match the _three with each other on the same plane and restrain the path with the restraining device 10. Therefore, in this embodiment, a pair of upper and lower rolls 10o, 10u
A plurality of deflector rolls 31, 32a, 32b, and 32c are arranged on the front side of the path restraining device 10 composed of: and wrapped around the lower roll 10u of the path restraining device 10 under a predetermined tension to increase rigidity and thereby restrict the path. Guiding accuracy is sufficiently ensured by ensuring that the guides provided by the respective guide devices on the apparatus entry side are ensured, and the path constraint by the path constraint device 10 can be ensured.

(Embodiment 6) FIGS. 22 to 24 show the present invention.
14 shows a sixth embodiment. In this embodiment, the welding pair
Elephant strip steel plate is 0.7mm, 1.2mm in thickness with different materials
mm, 0.7mm thin 3-strip strip steel plate.
Specifically, similarly to the second embodiment, the first welding process and the second welding process
In the two welding processes, the welding equipment (here
Laser beam welding machine, second laser beam welding machine)
Strips of three strips of different material by continuous welding in the longitudinal direction
To continuously obtain a welded steel plate consisting of Only
Thus, the two welding processes of the first welding process and the second welding process are performed in this way.
In the case of the contact process, the first laser beam welding machine 3₁By
From the second laser beam welding machine 3 _TwoBy welding
If the time difference is large, the first laser beam 3
_TwoStrip steel plate 1 welded by welding machine₁And strip steel plate 1_TwoBut,
Second laser beam welding machine 3_TwoUntil the welding heat reaches
Deforms in the course of distortion and subsequent cooling, resulting in the same plane
It is difficult to reliably converge and constrain the path
Nari, second laser beam welding machine 3_TwoDifficult to weld
Could be.

Therefore, in this embodiment, in order to reduce the influence of the change (deformation) in the shape of the welded strip-shaped steel sheet 1a in the second welding step, the unwelded strip-shaped steel sheet 1 having no shape deformation is used.
The side end on the non-welding side of No. ₃ is used as a reference, and this side end is pressed against the guide surface 20a of the guide device 20 to ensure the guidance. The side edge of the welding strip-shaped steel plate 1a on the welding side is formed by pressing the side edge of the welding strip-shaped steel plate 1a on the non-welding side with the guide surface 23a of the guide device 23 having the reciprocating mechanism 22 provided on the counter welding side. pressed against the welding side of the steel plate 1 _3, above convergence position, the side end of the steel strip 1 ₃ and strip welded steel 1a
Are welded continuously in the same plane. Further, the welding by the first laser beam welder 3 _1,
The time difference between the welding at the second laser beam welder 3 ₂ welding machine, and the equipment arrangement that can be within 20 seconds does not cause the above problems (disposed away 5 m). In this example, the two strip-shaped steel plates 1 ₁ and 1 ₂ mounted in a coil shape on the decoilers 2 ₁ and 2 ₂ are unbutted and joined, and the first welding process A is performed.
The abutted portion at w in the first welding step Aw having a first laser beam welder 3 _1, the steel strip 1 ₁ and the steel strip 1 ₂
A first laser beam welder 3 steel strip 1 ₁ is continuously welded in the longitudinal direction by _1, 1 ₂ consists welded steel strip 1a
And led to the second welding process Bw, where the welded strip steel plate 1a
The butt solving the steel strip 1 ₃ mounted in the coiled uncoiler 2 _3, the butt portion in the second welding step Bw continuously welded in the longitudinal direction by the second laser beam welder 3 _2, 3 Article a strip welded steel 1b made of a strip-shaped steel plate 1 _1, 1 _2, 1 _3, which is constituted as to cut at the outlet side shear 4 to produce a weld steel plates 1c.

More specifically, the uncoiler 2 ₁ ,
3 strip steel plates 1 mounted in coils 2 ₂ and 2 _3
1, 1 _2, 1 ₃ by solving, is guided to the inlet side Shah 6a~6c through the yarn end finding device bodies 5a to 5c, after being straightening in leveler 7a~7c cut defects of the head, the free loop 8a~ through 8c, the steel strip ₁ 1, 1 ₂ through the deflector roll 31, 32a, is parallel transported through 32b, and butted converged on the same plane is guided by the guide device 12,14,27 having a reciprocating mechanism , Restraint device 10
In a state in which the path constraint, welding strip which is welded to the butted portion by the first laser beam welder 3 ₁ of the first welding process Aw incorporated into this path constraining device 10, made of a strip-shaped steel plate 1 _1, 1 ₂ The steel sheet 1a is led to the second welding step Bw.

[0071] Welding the steel strip 1a passes through the first welding step Aw, Obijo steel 1 ₃ is parallel transported from deflector roll 31 through the deflector roll 32c. In this state, welding steel strip 1a, the Obijo steel plate 1 _3, butt converge on the same plane with and guided by the guiding device 20,22,34 with forward and reverse mechanism path restraining device 18, the butt portion, path constraint Second welding process B incorporated in device 18
Continuously welded in the longitudinal direction with a laser beam welding machine 32 of ₂ w to form a welded strip steel plate 1 b composed of _three strips of steel strips ₁ , 1, ₂ , and 13 of different materials. It is configured to be welded steel plate 1c and stored in pallet 24. When the strip-shaped steel plates 1 ₁ , 1, ₂ and ₃ are roughly butted in advance by the deflector roll 31 and merged with the welded strip-shaped steel plate 1 a and butted in the second welding step Bw, smooth butting is enabled.

In this embodiment, too, since a thin strip-shaped steel plate is to be welded, the rigidity is small as in the case of the fourth and fifth embodiments. it is difficult to, the steel strip _1,
It may be difficult to reliably pass restraining 1 ₂ at precisely butt restraint apparatus 10 in the same plane. Therefore, in this embodiment, a pair of upper and lower rolls 10o, 10u
A plurality of deflector rolls 31, 32a, 32b, 32c are arranged on the front side of the path restraining device 10 made up of the lower roll 1 of the restraining device 10 in the first welding process Aw under a predetermined tension.
0u, lower roll 18 of restraint device 18 in second welding process Bw
wrapped around u to increase the rigidity and ensure the guiding by the guide devices on the entrance side of the path restraining device to ensure sufficient matching accuracy, and to ensure the path restraint by the path restraining devices 10 and 18. I have. At this time, the thrust force in the width direction of the welded strip-shaped steel plate 1a is controlled by a thrust force separation roll provided between the side guide 27 and the guide device 22 and provided with a tilting mechanism with respect to the traveling direction, to smoothly guide the butt position. Ensure stable accuracy. for that reason,
The thrust force separation roll 33 can swing an angle δ in an oblique direction.

The present invention is not limited to the above embodiment. For example, the strip-shaped steel plates to be welded may be of the same material or of different thicknesses. Further, regarding the structure, arrangement, and number of arrangements of the transfer device, each guide device, the path restraining device, and the welding device, which constitute the present invention, the steel type, size, number of strips, welding conditions, equipment arrangement, etc. of the strip-shaped steel plate to be welded. Accordingly, there is a change within the range satisfying the claims.

[0074]

According to the present invention, the welded side end of the other strip-shaped steel sheet which is continuously welded to the one strip steel sheet in the longitudinal direction with reference to the side end position of the one strip steel sheet on the side opposite to the welding side. Is pressed against the side edge of the one strip steel plate on the welding side, and the butt portion is continuously welded by following the butt portion by a welding device having a tracking mechanism.
In the case of continuous welding of two or more strips, especially three or more strips having a size variation, in the longitudinal direction, the guide structure can be simplified and the operation can be simplified, and the welding side of the strip steel plate to be welded can be simplified. The strip-shaped steel plates are continuously welded in the longitudinal direction with the side ends securely butted with no gap therebetween, and a wide band-shaped welded steel plate of good quality can be obtained with high productivity.

[Brief description of the drawings]

FIG. 1 is an overall side explanatory view showing Example 1 of a continuous welding facility for a strip-shaped steel plate in a longitudinal direction of the present invention.

FIG. 2 is a partially enlarged side view showing a process of guiding a strip-shaped steel plate to be welded to a welding device in FIG. 1;

FIG. 3 is an explanatory plan view of FIG. 2;

4A is an enlarged cross-sectional view taken along the line Aa-Ab in FIG. 2, and FIG. 4B is a diagram illustrating another example of Aa-A in FIG.
This is shown in a cross-sectional enlarged explanatory view taken in the direction of the arrow b.

FIG. 5 is an enlarged cross-sectional explanatory view taken along line Ba-Bb in FIG. 2;

6 is an enlarged cross-sectional explanatory view taken along the arrow line Ca-Cb in FIG. 2;

FIG. 7 is an explanatory plan view of a welded strip steel sheet obtained by continuous welding in the longitudinal direction in Example 1.

FIG. 8 is an overall side explanatory view showing Example 2 of a continuous welding facility for a strip-shaped steel plate in the longitudinal direction of the present invention.

FIG. 9 is a partially enlarged side view illustrating the process of guiding the strip-shaped steel plate to be welded to the welding device in FIG. 8;

FIG. 10 is an explanatory plan view of FIG. 9;

11 is an enlarged cross-sectional explanatory view taken along the line Aa-Ab in FIG. 11;

FIG. 12 is an explanatory plan view of a welded strip-shaped steel sheet obtained by continuous welding in the longitudinal direction in Example 2 of the present invention.

FIG. 13 is an overall side explanatory view showing Example 3 of a continuous welding apparatus for a strip-shaped steel plate in the longitudinal direction of the present invention.

FIG. 14 is a partially enlarged side view illustrating a process of guiding the belt-shaped steel plate to be welded to the laser welding machine in FIG. 13;

FIG. 15 is an explanatory plan view of FIG. 14;

FIG. 16 is an overall side explanatory view showing Example 4 of a continuous welding facility for a strip-shaped steel plate in the longitudinal direction of the present invention.

FIG. 17 is a partially enlarged side view illustrating a process of guiding the belt-shaped steel sheet to be welded to the laser welding machine in FIG. 16;

FIG. 18 is an explanatory plan view of FIG. 16;

FIG. 19 is an overall side explanatory view showing Example 5 of a continuous welding apparatus for a strip-shaped steel sheet in the longitudinal direction of the present invention.

FIG. 20 is a partially enlarged side view illustrating the process of guiding the belt-shaped steel plate to be welded to the laser welding machine in FIG. 19;

FIG. 21 is an explanatory plan view of FIG. 19;

FIG. 22 is an overall side explanatory view showing Example 6 of a continuous welding facility for a strip-shaped steel plate in the longitudinal direction of the present invention.

FIG. 23 is a partially enlarged side view illustrating the process of guiding the belt-shaped steel plate to be welded to the laser welding machine in FIG. 22;

FIG. 24 is an explanatory plan view of FIG. 22;

FIG. 25 is an explanatory plan view showing a process of guiding a strip-shaped steel sheet to be welded to a welding device in a conventional example of continuous welding of a strip-shaped steel sheet in the longitudinal direction.

FIG. 26 is an explanatory side view of FIG. 25;

[Explanation of symbols]

1 _1, 1 _2, 1 _3: steel strip 1a: Welding the steel strip 1b: broad welding steel strip 1c: wide welding steel plate 2 _{1, 2} 2, 2 _3: uncoiler 3: Laser beam welder 3 _1: first laser beam welder 3 _2: second laser beam welding machine 3a, 3b: laser beam welder 3o: welding head W, Wa, Wb:
Welding 4: Outer shear 5a, 5b: Outer device 6a, 6b: Shear 7a, 7b: Leveler 8a, 8b: Free loop 9a to 9f: Transport device (roll) 10: Path restraining device 11: Advance / retract mechanism 10o: Upper roll 10u: Lower roll 12, 13: First guide device 12a, 13a:
Guide surface 14: Second guide device 14a: Guide surface 15: Advance / retreat mechanism 16a, 16b:
Free loops 17a to 17f: transport device 18: path restraining device 18o: upper roll 18u: lower roll 19: advance / retreat mechanism 20, 21: third guide device 20a, 21a: guide surface 22: advance / retreat mechanism 23: fourth guide device 24 , 24a: Pallet 25: Position detection sensor 26: Path restricting device 26o: Upper roll 26u: Lower roll 27: Side guide 28: Roll-down mechanism 29: Inclination mechanism 30: Advance / retreat mechanism 31, 32a, 32b, 32c: Deflector roll 33: Thrust force separation roll 34: Side guide (guide device) 35: Advance / retreat mechanism

Claims (25)

[Claims] 1. Side ends of strip-shaped steel plates adjacent in the width direction are butted, and this butted portion is continuously welded in the longitudinal direction.
It is a method for continuous welding of strip-shaped steel sheets having more than one strip, wherein the first strip-shaped steel sheet and the second strip-shaped steel sheet adjacent in the width direction are conveyed in parallel at different conveyance angles, and the respective conveyance surfaces are flush with each other immediately before the welding position. When converging so as to guide the side end position of one of the strip-shaped steel sheets on the non-welding side, and converge on the same plane, the welding-side end of the other strip-shaped steel sheet is brought into contact with one of the strip-shaped steel sheets. A continuous welding method for a strip-shaped steel sheet in a longitudinal direction, wherein the welding section is continuously butted against a side end on a welding side, and the butted portion is continuously welded. 2. Side ends of strip-shaped steel plates adjacent in the width direction are butted, and the butted portion is continuously welded in the longitudinal direction.
A method for continuously welding strip-shaped steel sheets having two or more strips, wherein (1) the first strip-shaped steel sheet and the second strip-shaped steel sheet adjacent in the width direction are conveyed in parallel at different conveyance angles, and the respective conveyance surfaces are immediately before the welding position. When converging so as to be on the same plane, one of the strip-shaped steel sheets is guided to the side end on the non-welding side to converge on the same plane, and then the welding-side end of the other strip-shaped steel sheet is placed on one side. The butt portion is continuously butted against the side end on the welding side, and the butt portion is continuously welded. (2) The third strip-shaped steel sheet adjacent in the width direction to the welded strip-shaped steel sheet consisting of the first strip-shaped steel sheet and the second strip-shaped steel sheet obtained by welding in (1) is transported at a different conveying angle at the subsequent stage of the first welding device. When conveyed in parallel, when converging so that each conveying surface is on the same plane immediately before the welding position, after guiding the side end position on the anti-welding side of the welding strip-shaped steel sheet, after converging on the same plane, A method for continuous welding in the longitudinal direction of a strip-shaped steel sheet, comprising continuously butting a side end of a third strip-shaped steel sheet on a welding side with a side end of a welding strip-shaped steel sheet on a welding side, and continuously welding the butted portion. 3. The side ends of the strip-shaped steel plates adjacent in the width direction are butted, and this butted portion is continuously welded in the longitudinal direction.
A method for continuously welding strip-shaped steel sheets having two or more strips, wherein (1) the first strip-shaped steel sheet and the second strip-shaped steel sheet adjacent in the width direction are conveyed in parallel at different conveyance angles, and the respective conveyance surfaces are immediately before the welding position. When converging so as to be on the same plane, one of the strip-shaped steel sheets is guided to the side end on the non-welding side to converge on the same plane, and then the welding-side end of the other strip-shaped steel sheet is placed on one side. The butt portion is continuously butted against the side end on the welding side, and the butt portion is continuously welded. (2) The third strip-shaped steel sheet adjacent in the width direction to the welded strip-shaped steel sheet consisting of the first strip-shaped steel sheet and the second strip-shaped steel sheet obtained by welding in (1) is transported at a different conveying angle at the subsequent stage of the first welding device. When conveyed in parallel and converge so that the respective conveying surfaces are flush with each other immediately before the welding position, guide the side end position on the anti-welding side of the third strip-shaped steel sheet and converge on the same plane A method of continuously welding a strip-shaped steel sheet in a longitudinal direction, wherein a welding-side end of the welded strip-shaped steel sheet is continuously butted against a welding-side end of a third strip-shaped steel sheet, and the butted portion is continuously welded. 4. A welding strip-shaped steel sheet consisting of a first strip-shaped steel sheet and a second strip-shaped steel sheet is conveyed in parallel with a third strip-shaped steel sheet, and before the respective conveying surfaces converge so as to be on the same plane immediately before the welding position. 4. The method according to claim 3, wherein the thrust force separating roll separates the thrust force in the width direction of the welding strip-shaped steel sheet before and after the thrust force separating roll. 5. After welding the first strip-shaped steel sheet and the second strip-shaped steel sheet,
The welded steel strip comprising the first steel strip and the second steel strip and the third steel strip are welded at the same position in the width direction within 20 seconds. Continuous welding method in the longitudinal direction of the strip steel plate. 6. A side end of a strip-shaped steel plate adjacent in the width direction is butted, and this butted portion is continuously welded in a longitudinal direction.
A method for simultaneous continuous welding of strips of strips or more, wherein three or more strips adjacent in the width direction are conveyed in parallel at different transfer angles between adjacent strips, and the respective transfer surfaces are welded. When converging to be on the same plane immediately before the position, guide the side end position of one of the strip-shaped steel sheets on both sides on the non-welding side and converge on the same plane, and then sequentially weld adjacent strip-shaped steel sheets. A continuous welding method in the longitudinal direction of a strip-shaped steel sheet, wherein the side end of the strip-shaped steel sheet is continuously butted against the welding side of the guided strip-shaped steel sheet, and the butted portions are continuously welded simultaneously. 7. The welding method according to claim 1, wherein when welding the butt portion, a welding device is fitted to the butt portion, and the welding torch of the welding device is followed or / and weaved. 2. The method for continuous welding of a strip-shaped steel sheet according to claim 1 in the longitudinal direction. 8. The longitudinal direction of the strip-shaped steel sheet according to claim 1, wherein when the strip-shaped steel sheets adjacent in the width direction are conveyed in parallel, the strip-shaped steel sheet is wound around a roll. Continuous welding method. 9. The steel strip according to claim 1, wherein at least one of the first strip, the second strip, and the third strip is a welded strip consisting of two or more strips.
The continuous welding method in the longitudinal direction of the strip-shaped steel sheet according to any one of the above. 10. The longitudinal direction of the strip-shaped steel sheet according to any one of claims 1 to 9, wherein a path is constrained at a convergence position or at a downstream side thereof when the transport surface converges on the same plane. Continuous welding method. 11. When a path is constrained at a position where a conveying surface converges on the same plane or at a downstream side thereof, a thrust force is applied to a strip-shaped steel sheet in a direction perpendicular to a traveling direction thereof to shift the sheet. The method for continuous welding in a longitudinal direction of a strip-shaped steel sheet according to claim 10. 12. The apparatus according to claim 10, wherein a guide device is disposed before and after the path restraining position, and when the path is restrained, the non-welded side of the strip-shaped steel sheet is guided by the guide device disposed before and after. A continuous welding method in the longitudinal direction of the strip-shaped steel sheet described in the above. 13. A continuous welding facility for two or more strip-shaped steel plates, which butt the side ends of the strip-shaped steel plates adjacent in the width direction and continuously welds the butt portion in the longitudinal direction, wherein the first strip-shaped steel plates are adjacent in the width direction. A transfer device having a convergence function of transferring a steel plate and a second strip steel plate in parallel at different transfer angles, converging just before the welding position, and making the transfer surfaces of the first strip steel plate and the second strip steel plate the same plane, A guide device for guiding the side end position of the other strip-shaped steel sheet on the non-welding side, a guide device for abutting the welded side end of the other strip-shaped steel plate with the welded side end of the one strip-shaped steel plate, A continuous welding facility in the longitudinal direction of a strip-shaped steel sheet, comprising a welding device for welding a butt portion between a steel sheet and a second strip-shaped steel sheet. 14. A continuous welding facility for three or more strip-shaped steel sheets which abuts side ends of the strip-shaped steel sheets adjacent in the width direction and continuously welds the butted portions in the longitudinal direction. A transfer device having a convergence function that conveys the first strip-shaped steel sheet and the second strip-shaped steel sheet in parallel at different transfer angles and converges immediately before the welding position to make the transfer surfaces of the first strip-shaped steel sheet and the second strip-shaped steel sheet the same plane. A guide device that guides a side end position on the anti-weld side of one of the strip steel plates, and a guide device that abuts a weld side end of the other strip steel plate to a weld side end of the one strip steel plate, A first welding step including a first welding device for welding a butt portion between the first strip-shaped steel plate and the second strip-shaped steel plate; and (2) a first welding device disposed downstream of the first welding device. Adjacent in the width direction to the welded strip consisting of the strip and the second strip A conveying device having a convergence function that conveys the third strip-shaped steel sheet in contact at different conveyance angles in parallel, converges immediately before the welding position, and makes the conveyance surface of the welding strip-shaped steel sheet and the third strip-shaped steel sheet the same plane, A guide device for guiding the side end position on the anti-weld side, a guide device for abutting the welded side end of the third strip steel plate to the welded side end of the welded strip steel plate, A continuous welding facility in the longitudinal direction of a strip-shaped steel plate, comprising a second welding step including a second welding device for welding a butt portion. 15. A continuous welding facility for three or more strip-shaped steel plates, which abuts side ends of strip-shaped steel plates adjacent in the width direction and continuously welds the butted portions in the longitudinal direction. A transfer device having a convergence function that conveys the first strip-shaped steel sheet and the second strip-shaped steel sheet in parallel at different transfer angles and converges immediately before the welding position to make the transfer surfaces of the first strip-shaped steel sheet and the second strip-shaped steel sheet the same plane. A guide device that guides a side end position on the anti-weld side of one of the strip steel plates, and a guide device that abuts a weld side end of the other strip steel plate to a weld side end of the one strip steel plate, A first welding step including a first welding device for welding a butt portion between the first strip-shaped steel plate and the second strip-shaped steel plate; and (2) a first welding device disposed downstream of the first welding device. Adjacent in the width direction to the welded strip consisting of the strip and the second strip A conveying device having a converging function that conveys the third strip steel plate in contact at different conveyance angles in parallel, converges immediately before the welding position, and makes the conveyance surfaces of the weld strip steel plate and the third strip steel plate the same plane, and a third strip steel plate. A guide device for guiding the side end position on the anti-weld side of the steel plate, a guide device for abutting the weld side end of the welded strip to the side end of the third strip steel plate, and a butt portion of the welded strip steel plate and the third strip steel plate And a second welding step provided with a second welding device for welding the steel strip. 16. A thrust force in the width direction of the welded strip steel sheet before the convergence position of the welded strip steel sheet and the third strip steel sheet comprising the first strip steel sheet and the second strip steel sheet obtained in the first welding step. The continuous welding equipment in the longitudinal direction of the strip-shaped steel sheet according to claim 15, wherein a thrust force separating roll for separating the steel sheet is disposed. 17. The longitudinal direction of a strip-shaped steel sheet according to claim 14, wherein the second welding device is arranged at a distance of 5 m or less behind the first welding device. Directional continuous welding equipment. 18. A continuous welding facility for simultaneously welding three or more strip-shaped steel sheets, which abuts the side ends of the strip-shaped steel sheets adjacent in the width direction and continuously welds the butted portions in the longitudinal direction, wherein the strip-shaped steel sheets are adjacent in the width direction. A conveying device that conveys three or more strip-shaped steel sheets in parallel at different conveying angles between adjacent strip-shaped steel sheets, a path restraining device that constrains each conveying surface to be on the same plane immediately before the welding position, A continuous welding equipment in the longitudinal direction of a strip-shaped steel sheet, comprising: a guide device for guiding a side end position of a steel plate; and two welding devices for welding two butted portions simultaneously. 19. The welding device according to claim 13, wherein the welding device includes a position adjusting mechanism in a width direction of the strip-shaped steel plate, and the welding torch includes a mechanism for following the butted portion and / or a weaving mechanism. 2. The method for continuous welding in the longitudinal direction of a strip-shaped steel sheet according to claim 1. 20. The transport device according to claim 13, wherein the transport device that transports the strip-shaped steel sheets adjacent in the width direction in parallel includes a winding roll that winds and transports the strip-shaped steel sheets. A continuous welding method in the longitudinal direction of the strip-shaped steel sheet described in the above. 21. A continuous strip in a longitudinal direction of a strip-shaped steel sheet according to claim 13, wherein a path restricting device is arranged at a position where the conveying surface converges on the same plane or at a downstream side thereof. Welding equipment. 22. The longitudinal direction of the strip-shaped steel sheet according to claim 21, wherein the path restraining device is provided with a mechanism for applying a thrust force to the strip-shaped steel sheet in a direction perpendicular to the traveling direction. Continuous welding equipment. 23. A mechanism for applying a thrust force to the strip-shaped steel sheet in a direction perpendicular to the traveling direction, the mechanism being one of a mechanism that makes the angle variable with respect to the traveling direction and a pressing mechanism that makes the pressing force variable in the sheet width direction. 23. The continuous welding equipment in the longitudinal direction of the strip-shaped steel sheet according to claim 22, wherein the equipment is both. 24. A continuous welding in a longitudinal direction of a strip-shaped steel sheet according to any one of claims 21 to 23, wherein a guide device for guiding the non-weld side of the strip-shaped steel sheet is disposed before and after the path restraining device. Facility. 25. A guide device for pressing a strip-shaped steel plate at least against a guide device for guiding a side end position on a non-welding side,
25. The continuous welding equipment in the longitudinal direction of a strip-shaped steel sheet according to any one of claims 13 to 24, further comprising a side end pressing mechanism for the strip-shaped steel sheet.