KR101201949B1 - Laser line shearing and welding apparatus of steel sheet - Google Patents

Abstract

The present invention relates to a laser line cutting and welding apparatus of a steel sheet, the laser line cutting and welding apparatus of a steel sheet according to the present invention, the first base material to be conveyed, and the first substrate for clamping the trailing base material conveyed along the preceding base material, respectively. 2 clamp units; A laser cutting unit for cutting the rear end of the preceding base material and the front end of the trailing base material at predetermined intervals, respectively; And a laser welding unit which welds to the neighboring ends of the line and trailing base material which are cut by the laser cutting unit.

According to the present invention, a process is performed by unwinding the steel sheet for each unit in the form of a hot coil, and precisely cutting the front end of the preceding steel plate and the trailing steel plate using a laser beam, and then cutting the two steel sheets. It is possible to improve the precision of cutting surface and welding, etc. by welding the steel plate face to face with laser beam, and notching process of cutting the edge of wide steel plate into curved surface by using laser beam when welding different steel plate width. It can be carried out, and the laser welding unit for welding both steel sheets is provided with only a concentrator to prevent the occurrence of vibration, etc. applied by the overweight, it is possible to precisely control the movement position.

Steel plate, clamping, cutting, welding

Description

LASER LINE SHEARING AND WELDING APPARATUS OF STEEL SHEET}

The present invention relates to a laser line cutting and welding apparatus of a steel sheet, and more particularly, a laser beam is used as a welding part when performing a process of welding a trailing end of a preceding steel sheet and a trailing steel sheet in a process of operating inline in the steel industry. The present invention relates to a laser line cutting and welding apparatus for steel sheets to be precisely cut and welded.

In general, unwinding the steel sheet for each unit in the form of a hot coil (hot coil) having a set length was performed by connecting the steel sheet for each unit to give continuity when performing a specific process.

The method of connecting the steel sheet by unit has been a trend that has been carried out by laser welding in recent years since the connecting portion is uneven while the stamper is used to connect the adjacent steel sheets.

Laser welding, which is a recent method for connecting such a steel sheet, cuts the welding surface using a mechanical method before performing welding, so that the cutter blade is blunted according to the frequency of use, which makes it difficult to manage the precise cutting surface.

In addition, when laser welding of steel sheet, the heavy weight laser generator is placed on the moving frame and moved to cause the failure of the laser generator, which is susceptible to vibration, and there is a limit to precise control because an excessively heavy frame is formed. .

In addition, since the width is different after welding when welding the steel plate of different widths, both edges of the wide steel plate that is not welded are sharp, which causes a post process.

The present invention has been made to solve the above problems, the object of which is to unwind the unit steel sheet in the form of a hot coil (hot coil) to perform a process, but the trailing and trailing of the preceding steel sheet using a laser beam The present invention provides a laser line cutting and welding apparatus for a steel sheet that can precisely cut the ends of the steel sheet and then weld the two cut steel sheets to each other by welding with a laser beam.

In addition, another object of the present invention, the laser line cutting and welding of the steel sheet to be able to perform a notching process for cutting the corners of the wide steel sheet to a curved surface using a laser beam when welding the steel sheet of different widths. In providing a device.

In addition, another object of the present invention is to provide a laser welding unit for welding both steel sheets to prevent the occurrence of vibration or the like caused by excessive weight, so that laser line cutting and welding of the steel sheet can be precisely controlled. In providing a device.

In order to achieve the above object, the present invention, in the apparatus for cutting the neighboring end of the line, the trailing steel plate, butt-welded, the first base material to be conveyed, and the first base material to be clamped along the preceding base material, respectively 2 clamp units; A laser cutting unit for cutting the rear end of the preceding base material and the front end of the trailing base material at predetermined intervals, respectively; And a laser welding unit which welds to the neighboring ends of the line and the trailing base material which are cut by the laser cutting unit.

In addition, the second clamp unit in the present invention is characterized in that it is moved in the width direction of the base material by the centering unit so that the center of the clamped preceding base material and the center of the clamped trailing base material can coincide.

In addition, the laser welding unit in the present invention, the moving frame which is formed in the opening on one side wall close to the base material to enter the butt portion of the line, the trailing base material; A horizontal moving unit installed below the moving frame to horizontally move the moving frame in the base material direction; A support part installed at the bottom of the opening of the moving frame to support the butt portion of the line and trailing base material; And a light collecting part installed on the ceiling surface of the opening of the moving frame and condensing the laser beams of the laser generator and the beam transmission system unit to the butt portions of the line and the trailing base material.

In addition, the laser generator of the present invention and the laser oscillator of the beam transmission system unit is characterized in that it is installed on the outside spaced from the frame.

In addition, the present invention further comprises an alignment unit for adjusting the distance between the rear end of the preceding base material and the front end of the trailing base material.

In addition, the present invention is characterized in that it further comprises a; laser notching unit for curved both sides of the welded base material when the width of the preceding base material and the following base material is different.

In addition, the laser generator and the beam transmission system unit in the present invention includes a laser oscillator for generating a laser beam; A first beam switch for controlling to provide a laser beam of the laser oscillator to a welding head of a laser welding unit or to a cutting head of a pair of laser cutting units; And a second beam switch configured to control splitting so that any one of the split laser beams is provided to the notching cutting head of the laser notching unit when the laser beam of the laser oscillator is split into a pair of cutting heads. It is characterized by.

In addition, the welding head and the cutting head in the present invention is characterized in that the angle is adjusted.

In addition, the centering unit in the present invention, the measuring device unit for obtaining data on the degree of separation of the center of the trailing base material from the center of the preceding base material; And a clamp unit moving unit configured to read the distance obtained by the control unit from the data acquired by the measuring unit and move the second clamp unit in the width direction of the trailing base material in accordance with the resultant value.

The laser line cutting and welding apparatus of the steel sheet according to the present invention, unwind the unit steel sheet in the form of a hot coil (un coil) to perform a process, but the front end of the preceding steel plate and the trailing steel plate using a laser beam After cutting the steel plate precisely, the two cut steel sheets are welded to each other with a laser beam, so that the precision of cutting and welding can be improved. Notching process can be performed to cut into a curved surface, and the laser welding unit for welding both steel sheets is provided with only a concentrator to prevent the occurrence of vibration caused by overweight, so that the precise control of the moving position is possible. have.

Hereinafter, a laser line cutting and welding apparatus for a steel sheet according to the present invention will be described with reference to an embodiment with reference to the accompanying drawings.

Laser line cutting and welding device 100 of the steel sheet according to an embodiment of the present invention, as shown in Figure 1, the first clamp unit 200, the second clamp unit 300, the centering unit 400, The alignment unit 500, the laser generator and the beam transmission system unit 600, the laser cutting unit 700, the laser welding unit 800, the laser notching unit 900, and the control unit C are included.

Here, the first clamp unit 200, the second clamp unit 300, the centering unit 400, the alignment unit 500, the laser generator and beam transmission system unit 600, the laser cutting unit 700, the laser The welding unit 800, the laser notching unit 900, and the control unit C are installed on the frame P. FIG.

And the frame (P) is provided at both ends of the roller table (not shown in the figure), respectively, and pull or push the leading base material (M1) and the trailing base material (M2) between the roller table and the frame (P) on both sides. A pinch roller (not shown in the figure) is mainly provided, and a laser welding unit 800 is installed above the center, and a pair of laser cutting units 700 are provided on both ends of the laser welding unit 800. These are respectively installed, the first clamp unit 200 and the second clamp unit 300 are installed between the laser cutting unit 700 and the pinch roller, respectively.

The roller table is installed for smooth transfer of the preceding base material M1 and the trailing base material M2, and the rollers arranged horizontally rotate freely.

The first clamp unit 200 is provided with a clamp member 210 at an upper end of the frame P, that is, above and below the loaded preceding base material M1, so that the preceding base material M1 is loaded, and then the position detecting sensor. (Not shown in the drawing) detects this, the clamp member lifting unit 212 is driven by the operation signal transmitted from the control unit C, thereby clamping the upper and lower surfaces of the preceding base material M1. In this case, the first clamp unit 200 may be driven in the front-rear direction by the front-rear driving means, and may be driven in the left-right direction by the left-right driving means. Here, the front and rear driving means and the left and right driving means are grafted, for example, a cylinder.

The second clamp unit 300 is provided with a clamp member 310 on the other end of the frame, that is, on the upper and lower sides of the loaded trailing base material M2, and the trailing base material M2 is loaded, and then the position detecting sensor (in the drawing). When not detected, the clamp member lifting unit 312 is driven by an operation signal transmitted from the controller C, thereby clamping the upper and lower surfaces of the trailing base material M2. At this time, the second clamp unit 300 can be driven in the front-rear direction by the front-rear drive means. Here, the front and rear driving means is grafted, for example, a cylinder.

As shown in FIG. 2, the centering unit 400 includes a center of the preceding base material M1 clamped by the first clamp unit 200 and a trailing base material M2 clamped by the second clamp unit 300. The second clamp unit 300 is a component for moving the second clamp unit 300 in the front-rear direction, which is the width direction of the trailing base material M2, so as to match the center of the center. Include.

The measuring device unit 410 acquires data on the separation degree of the center of the trailing base material M2 from the center of the preceding base material M1 and transmits the result value to the control unit C.

The clamp unit moving unit 420 is a front-rear drive unit of the second clamp unit 300. The clamp unit moving unit 420 reads the distance obtained by the control unit C from the data acquired by the measuring device unit 410, Accordingly, the second clamp unit 300 is a component that moves in the width direction of the trailing base material M2.

Here, the clamp unit moving part 420 is converted into a linear reciprocating motion to move the second clamp unit 300 in the front-rear direction, which is the width direction of the trailing base material M2.

As shown in FIG. 1, the alignment unit 500 is clamped by a first base material M1 by the first clamp unit 200, and a trailing base material M2 by the second clamp unit 300. ) Is clamped and the center of the preceding base material M1 and the trailing base material M2 are aligned by the centering unit 400 so that the gap between the trailing edge of the preceding base material M1 and the trailing base material M2 is adjusted. Adjust the setting to the spot size of the laser beam.

Here, the alignment unit 500 is a substrate spacing to move the first clamp unit 200 and the second clamp unit 300 in the entry direction or the opposite direction of the preceding base material M1 and the trailing base material M2. The control unit C receives the result value detected by the detection sensor (not shown in the figure). In addition, the first clamp unit 200 and the second clamp unit 300 are moved alone or simultaneously by converting the actuator to the actuator driving under the control of the controller C based on the result of the base metal gap sensor. .

The laser generator and beam transmission system unit 600 is a laser and optical system for providing a laser beam to the laser cutting unit 700, the laser welding unit 800 and the laser notching unit 900 as shown in FIG. , A laser oscillator 610, a first beam switch 620, a reflector 622, a beam energy splitter 624, and a second beam switch 626.

Here, the laser beam oscillated by the laser oscillator 610 is uniformly provided without spreading through a collimator (630) or the like before reaching the condenser 840, thereby the size of the laser beam condensed from the condensing head Stay constant regardless of the change.

The laser oscillator 610 is a component that generates a laser beam by an applied power source, and in the present invention, the laser cutting unit 700, the laser welding unit 800, and the laser notching unit 900 are also provided by one oscillator. Each of the laser beams is provided using the beam transmission system unit according to FIG. 4.

In particular, the laser oscillator 610 is not installed on the moving frame 810 of the laser welding unit 800, but is installed outside the moving frame 810, the vibration of the moving frame 810 according to the overweight Prevent occurrence.

The first beam switch 620 directly provides the laser beam oscillated by the laser oscillator 610 to the welding head 820 of the laser welding unit 800 or changes its direction through the reflector 622. It is a beam switch (Beam swich) which controls to provide to the cutting head 710 of the laser cutting unit 700 of the preceding base material M1 side of a pair.

At this time, the progress of the laser beam provided from the reflector 622 to the preceding base material M1 side cutting head 710 to provide the laser beam to the cutting head 710 of the trailing base material M2 laser cutting unit 700. A beam energy splitter 624 is provided along the path. The laser beam branched from the beam energy splitter 624 is reflected through another reflector 622 and is provided to the cutting head 710 by the second beam switch 626 or to the cutting head 910 for notching. .

That is, the second beam switch 626 is a cutting head 710 on the trailing base material M2 side of the divided laser beams when the laser beam oscillated by the laser oscillator 610 is divided into a pair of cutting heads 710. Or to the cutting head 910 for notching of the laser notching unit 900.

As shown in FIG. 1, each of the cutting heads 710 has a corresponding cutting head lifter before welding the rear end of the preceding base material M1 and the front end of the trailing base material M2 as shown in FIG. 1. The condenser 840 is finely lowered and focused in a lowered state by 720, and is then cut at predetermined intervals by the laser beam oscillated by the laser oscillator 610. Further, although not shown in the drawings, the cutting head 710 is further provided with front and rear moving parts and left and right moving parts in addition to the cutting head lifting part 720 as described above, and the cutting head lifting part 720 and the front and rear moving parts. And the left and right moving parts can be driven in the setting direction appropriately and precisely by an actuator or the like.

As shown in FIGS. 1 and 3, the laser welding unit 800 is configured to weld after facing the neighboring ends of the line and trailing base materials M1 and M2 cut by a pair of laser cutting units 700. The element includes a moving frame 810, a horizontal moving part 812, a welding head 820, a supporting part 830, and a light collecting part 840.

The moving frame 810 has an opening formed at one side wall close to the line and trailing base materials M1 and M2 so that the moving frame 810 moves to the butt site of the line and trailing base materials M1 and M2, and the rail is installed in the frame. Along the horizontal direction of the line and trailing base material (M1, M2) is moved horizontally.

The horizontal moving part 812 is installed below the moving frame 810 to horizontally move the moving frame 810 in the width direction of the line and trailing base materials M1 and M2 and is set by a linear reciprocating motion. Direction can be driven.

The welding head 820 is installed on the ceiling surface of the opening of the moving frame 810 and moves from one end of the opposing position of the line and the trailing base materials M1 and M2 to the other end with the trailing base material M1 and M2 by a laser beam. Is a component for welding.

At this time, since the angle of the welding head 820 is adjustable along with the vertical movement, when the heights of the line and trailing base materials M1 and M2 are different, the welding head 820 is inclined toward the welding surface direction of the high base material to weld.

The support part 830 is a plurality of pressing rollers which are installed at the bottom of the opening of the moving frame 810 to support the welded portions of the line and trailing base materials M1 and M2. At this time, a plurality of separate rollers are also provided on the upper side of the roller, and as the lifting and lowering is possible by a cylinder or the like, the welding part can be moved while supporting the welded portions at the top and the bottom when welding the line and trailing base materials M1 and M2.

The light collecting part 840 is installed on the ceiling surface of the opening of the moving frame 810 and is finely lowered by the driving of the light collecting part elevating member to focus the laser beam on the welded portion while focusing the laser beam.

On the other hand, although not shown in the drawing at least one of the gas injection unit for preventing the diffusion of the welding residue in the laser welding unit 800 or at least one of the monitoring unit for monitoring the data measured by the measuring device unit or the like through a monitor or more May be included.

The laser notching unit 900 is installed in the upper portion of the trailing base material M2 as shown in FIG. 1, and then welds the butted portions of the line and trailing base materials M1 and M2 and completes the welding of the preceding base material M1. When the width of the trailing base material M2 is different from the width of the line and trailing base materials M1 and M2, the notching cutting head 910 moves from side to side to move both ends of the welded base material of the laser oscillator 610. It is cut by a laser beam and curved.

The control unit C may include the first clamp unit 200, the second clamp unit 300, the centering unit 400, the alignment unit 500, the laser generator and the beam transmission system unit 600, and the laser cutting unit ( 700, driving of the laser welding unit 800 and the laser notching unit 900 are respectively controlled.

Therefore, the operation of the laser line cutting and welding apparatus of the steel sheet according to the present invention is as shown in Figs.

First, when the preceding base material M1 enters through the roller table on one side, the pinch roller moves forward to the lower side of the cutting head 710 of the laser cutting unit 700 at the cutting position while pressing the preceding base material M1. .

At this time, when the preceding base material M1 reaches the cutting position, the position detecting sensor detects this, sends a detection signal to the control unit C, and outputs the driving signal of the first clamp unit 200 from the control unit C. do.

Next, the clamp member 210 of the first clamp unit 200 is lowered by the driving signal of the controller C to clamp the preceding base material M1.

Next, when the trailing base material M2 enters through the roller table on the other side, the pinch roller presses the trailing base material M2 to the lower portion of the cutting head 710 of the laser cutting unit 700 at the cutting position. Let's do it.

At this time, when the trailing base material M2 reaches the cutting position, the position detecting sensor detects this and sends a detection signal to the control unit C, and outputs the driving signal of the second clamp unit 300 from the control unit C. do.

Next, the clamp member 310 of the second clamp unit 300 is lowered by the driving signal of the controller C to clamp the trailing base material M2.

Next, when the preceding base material M1 and the trailing base material M2 are clamped by the first and second clamping units 200 and 300, the center of the trailing base material M2 is moved by the centering unit 400. The distance between the front end of the preceding base material M1 and the trailing base material M2 by the alignment unit 500 so as to automatically adjust the mechanical tolerances according to the laser beam spot. It is set by the sensing result of.

Next, when the distance adjustment of the neighboring edges of the preceding base material M1 and the trailing base material M2 is completed, the cutting head 710 of the laser cutting unit 700 descends to focus the laser beam, and then the preceding base material M1. The trailing end of) and the leading end of the trailing base material M2 are cut at predetermined intervals by a laser beam.

Next, after cutting the front end of the preceding base material (M1) and the leading end of the trailing base material (M2) and then preceded by a laser beam irradiated uniformly without spreading during the operation of the laser generator and the beam transmission system unit (600). The rear end of the base material M1 and the front end of the trailing base material M2 are welded through the laser welding unit 800.

This is because the welding head 820 is moved by the support part 830 along the welding position of the leading and trailing base materials M1 and M2 when the moving frame 810 is moved by the driving of the horizontal moving part 812. , While supporting the welded portions of the trailing base materials M1 and M2 and welding them in the width direction of the base material while welding the laser beams irradiated through the light collecting part 840.

At this time, since the angle of the welding head 820 is adjustable along with the vertical movement, when the heights of the line and trailing base materials M1 and M2 are different, the welding head 820 is inclined toward the welding surface direction of the high base material to weld.

On the other hand, the gas injector or welding conditions to prevent the diffusion of the welding residue during the welding of the line, trailing base material (M1, M2) can be monitored through a monitor or the like measured data.

Next, when the welding of the line and trailing base materials M1 and M2 is completed, the moving frame 810 is returned to its original position by the driving of the horizontal moving unit 812, and the welded line and trailing base materials M1 and M2. Is unloaded.

On the other hand, when the width of the preceding base material (M1) and the trailing base material (M2) completed when the welding of the line, trailing base material (M1, M2) is different, in conjunction with the speed of the line, trailing base material (M1, M2) As the notching cutting head 910 of the laser notching unit 900 moves from side to side, both ends of the welded base material are cut and curved by the laser beam of the laser oscillator 610.

Although the detailed description of the present invention described above has been described with reference to the preferred embodiment of the present invention, the protection scope of the present invention is not limited to the above embodiment, and those skilled in the art will appreciate It will be understood that various modifications and changes can be made in the present invention without departing from the spirit and scope of the invention.

1 is a schematic diagram showing a laser line cutting and welding apparatus of a steel sheet according to the present invention.

2 is a schematic diagram showing a centering unit in the laser line cutting and welding apparatus of the steel sheet.

3 is a schematic view showing a laser welding unit in the laser line cutting and welding apparatus of the steel sheet.

4 is a schematic diagram showing a laser generator and a beam transmission system unit in the laser line cutting and welding apparatus of the steel sheet.

Description of the Related Art

100: laser line cutting and welding device of steel sheet

200: first clamp unit 212: clamp member lifting portion

300: second clamp unit 312: clamp member lifting portion

400: centering unit 410: measuring unit

420: clamp unit moving part 500: alignment unit

600: laser generator and beam transmission system unit 610: laser oscillator

620: First beam switch 622: Reflector

624: beam energy divider 626: second beam switch

700: laser cutting unit 710: cutting head

720: cutting head lift 800: laser welding unit

810: moving frame 812: horizontal moving part

820: welding head 830: support

840: light collector 900: laser notching unit

M1, M2: line, trailing base material

Claims (9)

In the apparatus for butt welding after cutting the neighboring ends of the line and the following steel sheet, First and second clamp units for clamping the preceding base material to be transferred and the trailing base material to be conveyed along the preceding base material; A laser cutting unit for cutting the rear end of the preceding base material and the front end of the trailing base material at predetermined intervals, respectively; A laser welding unit which welds to a neighboring end of the line and trailing base material cut by the laser cutting unit and then welds it; And An alignment unit for adjusting a distance between a rear end of the preceding base material and a front end of the trailing base material; In the laser line cutting and welding apparatus of a steel sheet comprising: The alignment unit, And an actuator configured to move the first and second clamps, respectively, by receiving a signal from a controller for detecting a gap between the preceding and the following base materials clamped by the first and second clamp units, respectively. The laser welding unit, A moving frame in which an opening is formed in one side wall close to the base material so as to enter the butt portion of the line and trailing base material, A horizontal moving part installed below the moving frame to horizontally move the moving frame toward the base material; A laser beam of the laser generator and the beam transmission system unit installed at the bottom of the opening of the movable frame to support the butt of the line and the trailing base material, and at the opening of the opening of the movable frame to the butt of the line and the trailing base material. Laser line cutting and welding device of a steel sheet comprising a light collecting portion for condensing the light. The method of claim 1, And the second clamp unit is moved in the width direction of the base material by a centering unit so as to coincide the center of the clamped preceding base material with the center of the clamped trailing base material. delete The method of claim 1, Laser line cutting and welding device of the steel sheet, characterized in that the laser generator and the laser oscillator of the beam transmission system unit is installed outside the frame. delete The method of claim 1, And a laser notching unit for curved both ends of the welded base material when the widths of the preceding base material and the trailing base material are different. The method of claim 1, wherein the laser generator and the beam transmission system unit, A laser oscillator for generating a laser beam; A first beam switch for controlling to provide a laser beam of the laser oscillator to a welding head of a laser welding unit or to a cutting head of a pair of laser cutting units; And And a second beam switch for controlling the splitting to provide a beam of any one of the split laser beams to the notching cutting head of the laser notching unit when the laser beam of the laser oscillator is split into a pair of cutting heads. A laser line cutting and welding device for steel sheet. The method according to claim 6, The welding head and the cutting head is laser line cutting and welding device of the steel sheet, characterized in that the angle is adjusted. The method of claim 2, wherein the centering unit, A measuring device unit for acquiring data on the degree of separation of the center of the trailing base material from the center of the preceding base material; And And a clamp unit moving unit for reading the distance obtained by the control unit from the data acquired by the measuring unit and moving the second clamp unit in the width direction of the trailing base material according to the result value. Laser line cutting and welding device.

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