KR20230111554A - Welding system for automatic laser - Google Patents

Abstract

The present invention relates to an automatic laser welding system, wherein a laser welding unit is realized to vary the welding angle according to the welding surface to precisely face the welding surface in order to precisely and perfectly weld a welding target having various physical structures or patterns such as a membrane sheet, and significantly reduce time required for the welding process. To this end, the automatic laser welding system according to the present invention comprises: a laser welding unit which is moved along a welding target by means of a moving means, and may perform welding at a welding target point according to the physical structure of the welding target; and a variable unit which varies the welding direction of the laser welding unit to correspond to the welding target point.

Description

Automatic laser welding system {WELDING SYSTEM FOR AUTOMATIC LASER}

The present invention relates to an automatic laser welding system, and more particularly, to an automatic laser welding system capable of making accurate and perfect laser welding for welding objects having various physical structures or patterns by varying the welding angle according to the welding surface, and significantly reducing the time required for welding work.

In general, one of the core technologies of LNG carriers, which are a type of high value-added ship, is a cargo hold for storing cryogenic liquid cargo, which requires a high degree of technical difficulty, safety and reliability.

The cargo hold of such an LNG carrier can be divided into an independent tank method and a membrane method, but preference for the membrane method is increasing in recent trend of larger LNG carriers.

The welding of such a conventional membrane-type cargo hold is performed by a so-called TIG welding method performed manually and an automatic welding method using plasma because the corrugation present in the member is complicated.

The conventional welding of the membrane forming complex curves is performed manually, and thus requires a lot of time and cost.

In addition, since the member is a thin plate, there is a problem in that thermal deformation appears as a serious problem during welding.

In addition, in the case of the automatic welding method using plasma, there is a problem in that it is not easy to weld according to the welding gap of the conventional membrane having a complicated bend.

In recent years, membranes that have recently emerged through structural technological development of membranes do not have bends in existing membranes, and the welded parts of all parts requiring welding work are straight. Therefore, high-speed and low heat input welding is possible, which is different from conventional membrane welding. However, since membranes with bends are also used according to various conditions or environments, there is an urgent need to develop a product that can automatically, quickly and accurately weld the membrane with bends.

Registered Patent Publication No. 10-2355413

The present invention has been made to solve the above-mentioned problems of the prior art, by realizing a laser welding unit capable of varying the welding angle according to the welding surface so that the welding surface can be accurately faced, such as a membrane sheet. It relates to an automatic laser welding system that can accurately and completely weld objects having various physical structures or patterns, while significantly reducing the time required for welding.

An automatic laser welding system according to an embodiment of the present invention, a laser welding unit that moves along an object to be welded through a moving means and can perform welding to a welding target point according to the physical structure of the object to be welded; and a variable part for varying the welding direction of the laser welding part to correspond to the welding target point.

And, after detecting the welding target position while moving along the welding target object in advance of the laser welding unit, it further includes a sensing unit for transmitting to the variable unit.

In addition, the moving means may include a guide rail installed long along the welding object and having a rack formed along the longitudinal direction; a slide unit that can be moved in both directions along the guide rail; a moving motor mounted on the slide unit; and a pinion gear that moves along the rack according to forward and reverse rotation of the moving motor.

The variable unit may include a tilting motor mounted on the moving means; A drive rotation bar rotated in forward and reverse directions by the power of the tilting motor; a driven pivoting bar disposed on one side of the driven pivoting bar and capable of being rotated in the same direction as the driving pivoting bar; an actuator including first and second shafts rotatably coupled to the driving and driven pivoting bars, respectively; an additional actuator disposed above the actuator and including third and fourth shafts rotatably coupled to the driving pivot bar and the driven pivot bar, respectively; and a mounting part including fifth and sixth shafts on which the laser welding part is mounted, disposed above the additional actuator, and rotatably coupled to the upper surface of the actuator and the upper surface of the actuator, respectively.

In addition, a forward and backward driving unit for moving the laser welding unit forward or backward with respect to the welding target point according to a detection signal of the sensing unit, wherein the forward and backward driving unit includes: a driving unit fixed to the moving unit; and a moving body that is coupled to the tilting motor and the driving unit, and moves the laser welding part forward or backward with respect to the welding target point by operation of the driving unit.

The automatic laser welding system according to the present invention can tilt the laser welding part in various directions and at various angles due to the structural characteristics of the drive pivot bar, the driven pivot bar, the actuator, the additional actuator, and the mounting unit. As a result, it is possible to accurately weld the entire welding target point formed on the protruding area and the recessed area of the welding object, such as a membrane sheet, while significantly reducing the time required for the welding operation.

And, in addition to the membrane sheet, there is an effect that can be accurately welded even in the case of an object to be welded that has a unique and complex physical structure or pattern.

1 is a perspective view showing a state in which an automatic laser welding system according to an embodiment of the present invention is applied to a membrane sheet.
Figure 2 is a view showing the coupling relationship between a tilting motor applied to an automatic laser welding system according to an embodiment of the present invention, a drive rotation bar, a driven rotation bar, an actuator, an additional actuator, and a mounting unit.
Figure 3 is a diagram showing a coupling state of a slide unit applied to an automatic laser welding system according to an embodiment of the present invention, a motor for movement, and a pinion gear.
Figure 4 is a plan view showing the tilting angle of the laser welding part in stages according to the operation of the tilting motor applied to the automatic laser welding system according to an embodiment of the present invention.
5 to 8 are diagrams showing a state in which a laser welding part is tilted on a membrane sheet in accordance with the operation of a tilting motor applied to an automatic laser welding system according to an embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments are provided to complete the disclosure of the present invention and to fully inform those skilled in the art of the scope of the invention to which the present invention belongs, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Like reference numerals have been assigned to like parts throughout the specification.

1 is a perspective view showing a state in which an automatic laser welding system according to an embodiment of the present invention is applied to a membrane sheet, and FIG. 2 is a view showing the coupled relationship between a tilting motor, a drive rotation bar, a driven rotation bar, an operating body, an additional operating body, and a mounting part applied to an automatic laser welding system according to an embodiment of the present invention. FIG. Figure 4 is a plan view showing the tilting angle of the laser welding part step by step according to the operation of the tilting motor applied to the automatic laser welding system according to an embodiment of the present invention, and Figs.

An automatic laser welding system 1 according to an embodiment of the present invention is a product capable of automatically welding a welding target point C formed along the longitudinal direction of an object to be welded while moving along the object to be welded.

To this end, the automatic laser welding system 1 according to an embodiment of the present invention may include at least one or more of a moving unit 30, a sensing unit 40, a laser welding unit 10, a variable unit 20, and a forward/backward driving unit 50.

At this time, although the drawing shows an example in which the objects to be welded are applied to the membrane sheets 60a and 60b, the object to be welded by the automatic laser welding system 1 according to an embodiment of the present invention is not limited to the membrane sheets 60a and 60b, and it is revealed that various objects can be welded.

Hereinafter, for convenience of description, an example in which a welding object is applied to the membrane sheets 60a and 60b will be described.

The moving means 30 sequentially transports the sensing unit 40 and the laser welding unit 10 along the welding target point C of the membrane sheets 60a and 60b.

To this end, the moving unit 30 may include a guide rail 31, a slide unit 32, a moving motor 33, a pinion gear 34, an additional slide unit 35, an additional moving motor 36, and an additional pinion gear 37.

The guide rail 31 is installed long in the horizontal direction along the membrane sheets 60a and 60b.

At this time, the guide rail 31 may be fixed to the front (F) of the protrusion 62 located on the lower layer with reference to FIG. 1 .

A rack 31 meshed with the pinion gear 34 and the additional pinion gear 37 is formed along the horizontal length direction of the guide rail 31 .

In addition, the guide rail 31 is spaced apart from the lower side of the rack 31 by a predetermined interval, and a support lip 312 supporting the pinion gear 34 and the additional pinion gear 37 is formed.

The support lip 312 may be formed to have the same length while being parallel to the rack 31 .

The slide part 32 is formed in a substantially 'c' cross-sectional shape, and surrounds the upper and lower surfaces and the front surface of the guide rail 31 .

The slide unit 32 may be moved in both directions along the guide rail 31 through the moving motor 33 and the pinion gear 34 .

A through hole through which the motor shaft of the moving motor 33 passes is formed in the slide part 32 .

In addition, since the slide part 32 is formed in a 'c' cross-sectional shape, an accommodating space 32a in which the pinion gear 34 is accommodated is naturally formed on the surface facing the guide rail.

The moving motor 33 and the pinion gear 34 perform a function of moving the slide unit 32 in the Y-axis direction.

The moving motor 33 is bolted or welded to the slide unit 32 .

To this end, the moving motor 33 may include a flange connected to the slide unit 32 by bolts or welding.

The moving motor 33 may be formed of an AC motor or a DC motor in which a motor shaft rotates in a forward or reverse direction.

The pinion gear 34 is engaged with the rack 31 while being accommodated in the accommodating space 32a of the slide unit 32, and the motor shaft of the moving motor 33 is coupled to its center.

Therefore, as the motor shaft of the moving motor 33 rotates, the pinion gear 34 moves along the rack 31 . As a result, the variable part 20 mounted on the slide part 32 and the laser welding part 10 mounted on the variable part 20 move along the horizontal direction of the membrane sheets 60a and 60b.

Meanwhile, the additional slide unit 35, the additional moving motor 36, and the additional pinion gear 37 perform a function of moving the sensing unit 40 along the longitudinal direction of the membrane sheets 60a and 60b.

Of course, since the sensing unit 40 should inform the laser welding unit 10 of the physical structure of the membrane sheets 60a and 60b, the additional movement motor 36 operates prior to the movement motor 33.

That is, the sensing unit 40 precedes the drive of the additional movement motor 36 to identify the welding target point C of the membrane sheets 60a and 60b, and the laser welding unit 10 follows the driving of the movement motor 33 to perform laser welding on the welding target point C of the membrane sheets 60a and 60b.

The additional slide part 35 is formed in a substantially 'c' cross-sectional shape, and surrounds the upper and lower surfaces and the front surface of the guide rail 31.

The additional slide unit 35 may be moved in both directions along the guide rail 31 through the additional motor 36 and the additional pinion gear 37 .

The additional slide part 35 is formed with a through hole through which the motor shaft of the motor for additional movement 36 passes.

And, since the additional slide part 35 is formed in a 'c'-shaped cross-section, an additional accommodating space 35a in which the additional pinion gear 37 is accommodated is naturally formed on the surface facing the guide rail.

The motor for additional movement 36 and the additional pinion gear 37 perform a function of moving the slide unit 32 in the Y-axis direction.

The additional movement motor 36 is bolted or welded to the additional slide unit 35 .

To this end, the additional movement motor 36 may include a flange connected to the additional slide unit 35 by bolts or welding.

The motor for additional movement 36 may be formed of an AC motor or a DC motor in which a motor shaft rotates in a forward or reverse direction.

The additional pinion gear 37 is engaged with the rack 31 while being accommodated in the additional accommodating space 35a of the additional slide unit 35, and the motor shaft of the additional moving motor 36 is coupled to its center.

Accordingly, as the motor shaft of the additional moving motor 36 rotates, the pinion gear 34 moves along the rack 31 . As a result, the sensing unit 40 mounted on the additional slide unit 35 moves along the horizontal direction of the membrane sheets 60a and 60b.

The sensing unit 40 performs welding to the welding target point C according to the physical structure of the membrane sheets 60a and 60b.

To this end, the sensing unit 40 moves along the guide rail 31 through the additional slide unit 35 and detects the physical structure of the membrane sheets 60a and 60b, and then transmits an operation control signal to the tilting motor 21 and the driving means 51 of the variable unit 20 described below.

At this time, as illustrated in FIG. 1 , the membrane sheets 60a and 60b may be arranged to be stacked in the upper and lower directions.

In addition, the membrane sheets 60a and 60b have a structure in which a plurality of flat plate parts 61, which are recessed areas, and a plurality of protrusions 62, which are protruding areas, are continuously arranged to cross each other.

At this time, the protrusion 62 may be formed in various shapes such as a substantially curved shape and a 'c' shape, and an example formed in a substantially semicircular cross-sectional shape is shown in the drawings.

Therefore, the sensing unit 40 senses the physical structure of the point to be welded (C), which is the joint between the membrane sheets 60a and 60b, and transmits it to the variable unit 20 described below.

At this time, the sensing unit 40 may be applied as a known vision device to detect the welding target point C on the flat plate portion 61 located inside the protrusion 62 and the welding target point C on the protrusion 62.

In addition, the sensing unit 40 may detect the depth of the flat plate part 61 and the protruding length of the protruding part 62 by using the ultrasonic principle that is emitted and returned.

Furthermore, the sensing unit 40 may be programmed to detect the inclination or curvature of the front side F and both sides S1 and S2 of the protrusion 62 .

On the other hand, the laser welding unit 10 is configured to perform laser welding on the welding target point C of the membrane sheets 60a and 60b.

That is, the laser welding unit 10 moves along the welding target point C of the membrane sheets 60a and 60b through the moving means 30, and the membrane sheets 60a and 60b by the sensing unit 40. The welding target point C is welded according to the physical structure.

This laser welding part 10 uses a laser beam and has a high concentration of welding energy, so welding with a small heat-affected zone is possible, so there is no change in chemical, physical, or mechanical properties of the base material, and a narrow bead width and deep penetration depth can be obtained. Because of this, it is suitable for welding under adverse conditions such as radioactive material welding, and has the advantage of easy process automation.

On the other hand, the variable unit 20 performs a function of varying the welding direction of the laser welding unit 10 to correspond to the welding target point C.

To this end, the variable unit 20 may include at least one of a tilting motor 21, a drive rotation bar 22, a driven rotation bar 23, an actuator 24, an additional actuator 25, and a mounting unit 26.

The tilting motor 21 is mounted on the moving means 30 via the moving body 52 of the forward and backward driving unit 50 to be described later.

The tilting motor 21 may be formed of an AC motor or a DC motor that rotates a motor shaft in a forward or reverse direction.

The tilting motor 21 rotates the drive rotation bar 22 so that the laser welding part 10 is tilted toward the welding target point C.

One side of the driving pivot bar 22 is coupled to the motor shaft of the tilting motor 21 .

Therefore, the drive rotation bar 22 can be rotated in the forward or reverse direction by the power of the motor 21 for tilting.

At this time, the driving pivot bar 22 is rotated in place in the form of an hour hand or a minute hand.

The driven pivoting bar 23 is disposed parallel to one side of the driven pivoting bar.

The driven pivot bar 23 is connected to the drive pivot bar 22 via an actuator 24 and an additional actuator 25. Therefore, the driven pivoting bar 23 can be rotated through the rotational force of the driving pivoting bar 22 .

At this time, the driven pivot bar 23 may be rotated in the same direction as the drive pivot bar 22 .

Furthermore, as shown in FIG. 4 , the driven pivot bar 23 is always parallel to the driving pivot bar 22 no matter what angle it is rotated.

Based on FIG. 4, a binding hole in which the motor axis of the tilting motor 21 is shaped on the front side of the driving circuit bar 22 is formed, and the driving circuit bar 22 and the central part of the passive circuit bar 23 are formed, and the other coupling hole in which the operating element 24 is coupled is formed, and the driving circuit bar 22 and the rear side of the passive circuit bar 23 Another coupling hole in which (25) is shaped is formed, respectively.

The driving pivot bar 22 and the driven pivot bar 23 are rotated in parallel while maintaining a certain distance from each other by the connection structure of the actuator 24 and the additional actuator 25.

The operating body 24 includes a first shaft 241 and a second shaft 242 coupled to coupling holes formed in the central portions of the driving pivot bar 22 and the driven pivot bar 23, respectively.

The first shaft 241 and the second shaft 242 may be rotated in place in a coupling hole formed in the central portion of the drive pivot bar 22 and the driven pivot bar 23 .

The actuator 24 may include an upper horizontal portion 24a whose front end faces the membrane sheets 60a and 60b, a vertical portion 24b bent downward at a right angle at the rear end of the horizontal portion, and a lower horizontal portion 24c bent in a direction away from the membrane sheets 60a and 60b at the lower end of the vertical portion 24b.

Therefore, the operating body 24 is formed in a stepped shape with a cross-sectional shape viewed from the side, substantially like a staircase.

And, the aforementioned first and second shafts 241 and 242 are formed on the rear side of the lower horizontal portion 24c.

The additional actuator 25 is located on top of the actuator 24 .

The additional actuator 25 includes a third shaft 251 and a fourth shaft 252 coupled to coupling holes formed at rear sides of the driving pivot bar 22 and the driven pivot bar 23, respectively.

The third shaft 251 and the fourth shaft 252 may be rotated in place in coupling holes formed at rear sides of the drive pivot bar 22 and the driven pivot bar 23 .

The additional actuator 25 may include an additional upper horizontal portion 25a whose front end faces the membrane sheets 60a and 60b, an additional vertical portion 25b bent downward at a right angle at the rear end of the additional horizontal portion, and an additional lower horizontal portion 25c bent in a direction away from the membrane sheets 60a and 60b at the lower end of the additional vertical portion 25b.

Therefore, the additional actuator 25 has a cross-sectional shape viewed from the side that is substantially stepped like a staircase.

And, the aforementioned third and fourth shafts 251 and 252 are formed on the rear side of the lower horizontal portion 25c.

The mounting portion 26 is disposed on the upper side of the additional actuator 25 .

The laser welding part 10 is mounted on the upper surface of the mounting part 26 .

A fifth shaft 261 and a sixth shaft 262 coupled to the upper surface of the actuator 24 and the upper surface of the additional actuator 25 are respectively formed on the bottom surface of the mounting unit 26 .

Coupling holes to which the fifth shaft 261 and the sixth shaft 262 are coupled are formed in the actuator 24 and the additional actuator 25, respectively.

In addition, the fifth shaft 261 and the sixth shaft 262 may be rotated in place in the coupling holes of the actuator 24 and the additional actuator 25, respectively.

On the other hand, the forward and backward driving unit 50 is configured to move the laser welding unit 10 forward or backward with respect to the welding target point C according to the detection signal of the sensing unit 40 .

To this end, the forward/reverse driving unit 50 may include at least one or more of a driving means 51 and a movable body 52 .

The driving means 51 is installed on one side wall of the slide part 32 constituting the moving means 30 .

The driving means 51 may be formed of any one of a linear cylinder, a rodless cylinder, and an LM guide.

The motor 21 for tilting is coupled to one side of the moving body 52, and the other side is coupled to the moving piston 511 constituting the driving means 51.

The driving means 51 is installed in a structure in which the moving piston 511 can move forward or backward with respect to the membrane sheets 60a and 60b.

Therefore, when the moving piston 511 moves forward or backward, the moving body 52, the tilting motor 21, the drive rotation bar 22, the driven rotation bar 23, the actuator 24, the additional actuator 25, the mounting part 26, and the laser welding part 10 are simultaneously moved forward or backward with respect to the membrane sheets 60a and 60b.

Therefore, the distance between the laser welding part 10 and the welding target point C can be adjusted.

The forward/backward driver 50 is operated when the laser welding part 10 moves from the flat part 61 to the protruding part 62 or from the protruding part 62 to the flat part 61, so that the laser welding part 10 can perform laser welding while moving along the welding target point C on the flat plate part 61 and the welding target point C on the protruding part 62.

Next, the operation of the automatic laser welding system 1 according to an embodiment of the present invention described above and the unique effects appearing in the process will be described.

First, the sensing unit 40 moves along the horizontal longitudinal direction of the guide rail 31 by the mutual operation of the additional movement motor 36 and the additional pinion gear 37, and detects the joint, which is the point to be welded (C), in the membrane sheets 60a and 60b stacked up and down, and then transmits it to the tilting motor 21, the movement motor 33, and the driving means 51.

Then, the driving means 51 is driven so that the laser welding part 10 faces the welding target point (C).

In addition, the tilting motor 21 tilts the laser welding part 10 in the left and right directions with respect to the membrane sheets 60a and 60b according to the physical structure of the welding target point C transmitted from the sensing unit 40, so that the laser welding unit 10 laser welds the welding target point C according to the physical structure of the membrane sheets 60a and 60b.

At this time, the sensing unit 40 moves at a predetermined distance from the protrusion 62, and detects the width and length of the flat plate part 61, the width and length of the protrusion 62, the depth of the flat plate part 61, and the curvature and length of both side surfaces S1.

At this time, the protruding length of the protruding portion 62 relative to the flat portion 61 may be calculated by measuring the depth (length) between the flat portion 61 and the front surface F of the protruding portion 62 .

Furthermore, the sensor 40 can obtain the X and Y values at which the laser welding part 10 moves through the image data of the welding target point C of the membrane sheets 60a and 60b, and interprets/analyzes the structural data of the membrane sheets 60a and 60b to extract the physical structure of the welding target point C of the flat portion 61 and the protrusion 62 of the membrane sheets 60a and 60b, and use the tilting motor 21 And, it can be programmed to transmit an operation signal to the moving motor 33 and the driving means 51.

Since the specific configuration and operating method of the sensing unit 40 is a commercialized technology, a detailed description thereof will be omitted.

On the other hand, by the interaction of the moving motor 33 and the pinion gear 34, the laser welding part 10 moves from the starting point (rightmost with reference to FIG. 1) to the end point (leftmost with reference to FIG. 1) of the welding target point C. While moving to the welding target point C, all of the welding target points C are laser welded.

At this time, FIG. 4 shows the welding angle and direction of the laser welded part 10 by the variable part 20. The tilting motor 21, the driving pivot bar 22, the driven pivot bar 23, the actuator 24 and the additional actuator 25 are interacted with each other or by the coupling relationship through the axes 241, 242, 251, 252, 261, 262, the laser welded part 10 It can be tilted at various angles in the left and right directions.

That is, the first shaft 241 and the second shaft 242 are rotatably coupled to the driving rotation bar 22 and the driven rotation bar 23, the third shaft 251 and the fourth shaft 252 are rotatably coupled to the driving rotation bar 22 and the driven rotation bar 23, and the fifth shaft 261 and the sixth shaft 262 are the actuator 24 and the additional actuator 25 Due to being rotatably coupled to the tilting motor 21, the drive pivot bar 22 and the driven pivot bar 23 are uniformly rotated in correspondence with the rotation direction and rotation angle of the motor shaft provided in the tilting motor 21, and the actuator 24 rotates on the drive pivot bar 22 and the driven pivot bar 23 by the first shaft 241 and the second shaft 242, and the additional actuator 25 rotates on the third shaft 251 and It is rotated on the drive pivot bar 22 and the driven pivot bar 23 by the fourth axis 252, and the mounting part 26 is tilted in various angles in the left and right directions on the actuator 24 and the additional actuator 25 by the fifth axis 261 and the sixth axis 262, and eventually, the laser welding part 10 is tilted to correspond to the physical structure of the welding target point C of the membrane sheets 60a and 60b It is possible to perform laser welding while being tinged.

Through the configurations of the automatic laser welding system 1 according to an embodiment of the present invention, in the state shown in FIG. 1, the tilting motor 21 does not tilt the laser welding part 10 because the laser welding part 10 moves by the moving means 30 and laser welds the flat plate part 61, but since the flat part 61 is located deep inside compared to the protruding part 62, the driving means 51 is laser welded by the signal transmitted from the sensing unit 40 By advancing and bringing the part 10 closer to the welding target point C, the laser welding part 10 can perform accurate welding.

In this case, it is possible to perform the laser welding operation while the laser welding unit 10 moves while accurately facing the welding target point C.

Next, in a situation where the laser welding part 10 sequentially laser welds the side surface S2, front surface F, and side surface S1 of the protruding part 62, as shown in FIGS.

6 and 7, as the driving pivot bar 22 and the driven pivot bar 23 are rotated to the right, the laser welded part 10 is tilted in a swinging manner, so that the welding direction changes from right to left.

At this time, as the laser welded portion 10 moves from the side surface S2 to the front side F, the driving means 51 operates to gradually move the laser welded portion 10 backward.

Due to this, the laser welding unit 10 performs laser welding while moving along the entire area of the side surface S2.

On the other hand, as the driving pivot bar 22 and the driven pivot bar 23 are rotated to the left with reference to FIGS. 6 and 7, the laser welded part 10 is tilted in a swinging manner, and the welding direction is changed from right to left as shown in FIG. 8.

At this time, as the laser welding part moves from the front side F to the side surface S1, the driving means 51 is operated to gradually advance the laser welding part 10.

Due to this, the laser welding unit 10 moves along the entire area of the front surface (F) and then moves along the entire area of the side surface (S1) to perform laser welding.

Therefore, the automatic laser welding system 1 according to an embodiment of the present invention, through the above-described configurations and operating principle, the laser welding unit 10 accurately faces the welding target point C. It is possible to perform the laser welding operation.

In particular, due to the structural features of the drive pivot bar 22, the driven pivot bar 23, the actuator 24, the additional actuator 25, and the mounting portion 26, the multi-angle tilting action of the laser welded portion 10 can be performed by one tilting motor 21, while simplifying the product, the laser welded portion 10 has a horizontal section corresponding to the flat plate portion 61, the side of the protrusion 62 ( The laser welding operation can be performed while facing each other accurately even in the inclined section or curved section corresponding to S1 and S2).

That is, the automatic laser welding system 1 according to an embodiment of the present invention can provide the advantage of accurately and completely laser welding the entire welding target point C even if the physical structure is irregular and complex.

Those skilled in the art to which the present invention pertains will understand that the present invention can be embodied in other specific forms without changing its technical spirit or essential features. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. The scope of the present invention is indicated by the claims to be described later rather than the detailed description above, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts thereof are included in the scope of the present invention. It should be construed.

1: automatic laser welding system 10: laser welding part
20: variable part 21: motor for tilting
22: drive pivot bar 23: driven pivot bar
24: operating body 24a: upper horizontal part
24b: vertical part 24c: lower horizontal part
241: first axis 242: second axis
25: additional operating body 25a: additional upper horizontal part
25b: additional vertical portion 25c: additional lower horizontal portion
251: 3rd axis 252: 4th axis
26: Mounting unit 261: 5th axis
262: 6th axis 30: means of movement
31: guide rail 311: rack
312: support lip 32: slide part
32a: accommodation space 33: motor for movement
34: pinion gear 35: additional slide part
35a: additional accommodation space 36: motor for additional movement
37: additional pinion gear 40: sensing unit
50: forward and backward driving unit 51: driving means
511: moving piston 52: moving body
60a, 60b: membrane sheet 61: flat plate
62: protrusion

Claims (5)

A laser welding unit that moves along the object to be welded through a moving means and can perform welding at a point to be welded according to the physical structure of the object to be welded; and
An automatic laser welding system comprising a variable part for varying the welding direction of the laser welding part to correspond to the welding target point.
According to claim 1,
The automatic laser welding system further comprises a sensing unit that precedes the laser welding unit and detects a welding target position while moving along the welding target object and transmits the result to the variable unit.
According to claim 1,
The means of transportation is
a guide rail installed long along the object to be welded and having a rack formed along the longitudinal direction;
a slide unit that can be moved in both directions along the guide rail;
a moving motor mounted on the slide unit; and
An automatic laser welding system comprising a pinion gear that moves along the rack according to forward and reverse rotation of the moving motor.
According to claim 1,
The variable part,
a tilting motor mounted on the moving means;
A drive rotation bar rotated in forward and reverse directions by the power of the tilting motor;
a driven pivoting bar disposed on one side of the driven pivoting bar and capable of being rotated in the same direction as the driving pivoting bar;
an actuator including first and second shafts rotatably coupled to the driving and driven pivoting bars, respectively;
an additional actuator disposed above the actuator and including third and fourth shafts rotatably coupled to the driving pivot bar and the driven pivot bar, respectively; and
An automatic laser welding system including a mounting portion on which the laser welding unit is mounted, disposed on the upper side of the additional actuator, and including fifth and sixth axes rotatably coupled to the upper surface of the actuator and the upper surface of the actuator, respectively.
According to claim 2,
Further comprising a forward and backward driving unit for moving the laser welding unit forward or backward with respect to the welding target point by the detection signal of the sensing unit,
The forward and backward drive unit,
a driving means fixed to the moving means; and
An automatic laser welding system comprising a movable body coupled to the tilting motor and the driving means to move the laser welding part forward or backward with respect to the welding target point by operation of the driving means.

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