KR20130091151A - Inline welding apparatus - Google Patents

Abstract

PURPOSE: An inline welding machine is provided to rapidly perform more welding works and to reuse multiple jigs which are used by automatically circulating the multiple jigs. CONSTITUTION: An inline welding machine comprises multiple transfer lines (11,13), a shield can welding unit (30), a weldment unloading unit (50), and a lower jig returning unit (90). The transfer lines transfer multiple weldments which are settled on multiple lower jigs respectively. The shield can welding unit welds multiple weldments by laser welding. The weldment unloading unit unloads the multiple weldments from the lower jigs. The lower jig returning unit returns the lower jigs to the upper stream of the multiple transfer lines.

Description

Inline Welding Equipment {INLINE WELDING APPARATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inline welding device, and more particularly, to an inline welding device for laser welding a gasket attached to a rear portion and a rear portion of a shield can to be welded.

In general, a wireless communication device used in direct contact with a human body, such as a smartphone, is damaging to the human body due to electromagnetic waves generated by the device itself. Therefore, a shield can is installed inside the wireless communication device to shield electromagnetic waves. Such a shield can is made up of a rear part that physically protects electronic components embedded in the device with blocking electromagnetic waves, and a gasket that reinforces a gap with a cover during assembly.

Conventionally, in order to weld the rear portion and the gasket of the shield can, the shield can rear portion and the gasket are arranged by hand, and then spot welded, or each component is placed in a small welding jig and spot welded. I've been working. However, in the case of welding in the conventional manner, the adhesion between the rear portion and the gasket is deteriorated, and the problem of failing to set the individual parts at the correct position and failing to perform uniform and precise welding work frequently occurs.

In addition, since most of the welding work is performed manually by a large number of workers, there is a problem that the work speed is low and the work efficiency is low, resulting in low productivity.

In order to solve the above problems, the present invention includes a lower jig and an upper jig for stably setting and supporting the object to be welded, and having a plurality of transfer lines for transporting the object to be welded and a single laser irradiator installed therein. It is possible to provide a large number of welding operations quickly, and to provide an inline welding apparatus which can automatically reuse and reuse a plurality of lower jigs once used.

In order to achieve the above object, the present invention provides a plurality of transfer lines for transferring a plurality of the welded object in a state respectively seated on a plurality of lower jig; A shield can welding unit having an upper jig corresponding to each of a plurality of lower jigs respectively transferred by the plurality of transfer lines, the shield can being disposed on the plurality of transfer lines to laser weld a plurality of objects to be welded; A to-be-unloaded part which takes out a plurality of to-be-welded objects welded by the shield can welding part from a lower jig; And a lower jig return unit for returning upstream of the plurality of transfer lines to reuse the plurality of lower jigs that have passed through the object to be unloaded.

The shield can welding unit includes: a laser irradiation unit for irradiating a laser beam generated from a laser oscillator to the welded object; And a movable part for transferring the laser irradiation part in the X-axis and Y-axis directions on a plane according to a preset welding coordinate.

The shield can welding unit may be disposed to circulate within the shield can welding unit and further include a circulation transfer unit for sequentially transferring the plurality of lower jigs transferred from the plurality of transfer lines to the welding position.

The upper jig may include a plurality of jig pin units through which at least one guide hole through which the laser light radiated by the laser irradiator passes is formed, and for elastically pressing the to-be-welded object. In this case, it is preferable that the guide hole has an amorphous loop shape including welding points of the welded object.

The plurality of jig pin units, respectively, the support vertically fixed to the upper jig; A contact pin slidably coupled to the support; And an elastic member installed in the support to elastically support the contact pin.

The welded object includes a gasket welded to a rear portion of the shield can and the rear portion, the lower jig having a recess for setting the rear portion, and for supporting a rounded bent portion of the rear portion along the periphery of the recess. It is preferable that corners are formed.

It is of course also possible to further include a printing unit for printing a preset notation on a part of the welded object taken out from the welded object unloading unit.

The lower jig return unit may include: a first elevator disposed at a lowermost portion of the plurality of transfer lines to lower the plurality of lower jigs; A plurality of return lines for conveying a plurality of lower jigs conveyed by the first elevator to an upstream side of the plurality of conveying lines; And a second elevator disposed at a lowermost portion of the plurality of transfer lines and configured to raise the plurality of lower jigs transferred by the plurality of return lines to the plurality of transfer lines.

As described above, in the present invention, the welding position is deteriorated by preventing the setting position of the welded object from being changed during transport or welding as it is stably set and supported through the lower jig and the upper jig. It can prevent.

In addition, the present invention can improve the productivity by maximizing the work efficiency as a rapid welding is made by a single shield can irradiated to a plurality of welded objects supplied through a pair of transfer line.

Furthermore, the present invention can reduce the cost of the lower jig can be significantly lowered by automatically circulating and reuse a plurality of lower jig used once.

1 is a side view showing an inline welding apparatus according to an embodiment of the present invention,
FIG. 2 is a side view seen from the direction II shown in FIG. 1,
3 is a plan view illustrating a state in which a shield can rear portion and a gasket are set in a lower jig;
4 is a cross-sectional view taken along line IV-IV shown in FIG. 3,
5 is a plan view showing a state in which the upper jig is installed,
6 is a perspective view showing the bottom of the upper jig,
7 is a schematic cross-sectional view showing a jig pin unit provided in the upper jig,
8 is a schematic view showing the operation trajectory of the movable member of the circulation transfer section for circularly moving the lower jigger.

Hereinafter, an inline welding apparatus for welding a rear portion and a gasket of a shield can according to an embodiment of the present invention will be described with reference to the accompanying drawings. However, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

1 and 2, the in-line welding apparatus according to an embodiment of the present invention a plurality of transfer lines (11, 13), the shield can welding portion 30, the object to be unloaded portion 50, the printing portion 70 ) And a lower jig return unit 90.

The plurality of transfer lines 11 and 13 are used to supply the lower jig 3 having the welded object (the rear portion 1 and the gasket 2 of the shield can, see FIG. 3) to the shield can welding portion 30. Conveyor apparatus, arranged in parallel at a predetermined interval. In this embodiment, the transfer lines 11 and 13 are installed as two examples, but the present invention is not limited to the number of installations, and may be installed in an appropriate number in consideration of the size and output of the installation site. In this case, it is preferable that the shield can welding part 30 sets the distance moving in the Y-axis direction (orthogonal to the direction in which the lower jig is transferred) to correspond to the number of installation of the transfer line.

Referring to FIG. 4, the lower jig 3 has grooves 3a formed to set one shield can rear portion 1 and a gasket 2, and is transported in pairs. In this case, the lower jig 3 Is transported in a pair of seated in each of the plurality of shuttle (5) installed in each of the transport line (11, 13). The groove 3a of the lower jig 3 has a lower end 1a of the shield can rear part 1 on the bottom surface of the groove 3a with the shield can rear part 1 set on the lower jig 3. It is made so deep that it cannot reach.

On the other hand, the groove 3a of the lower jig 3 has a corner 3b formed along the periphery, and the bent portion 1b of the shield can rear portion 1 is in a rounded state having a predetermined radius value. In this case, the shield can rear portion 1 set in the groove 3a is supported with the bent portion 1b in line contact with the corner 3b. Accordingly, when the shield can rear portion 1 is seated in the recess 3a, the shield can rear portion 1 is always seated at the same position of the lower jig 3 by the weight of the shield can rear portion 1. do. This same location takes into account the exact welding location.

In addition, as the bent portion 1b and the edge 3b are in line contact with each other, the contact area between the shield can rear portion 1 and the lower jig 3 is minimized. That is, the shield can rear portion 1 except for the line contact portion is not in contact with the lower jig (3). Accordingly, the shield can rear portion 1 reduces jig interference with the lower jig 3 when taking out the shield can rear portion 1 from which the welding is completed in the weld-unloaded portion 50 from the lower jig 3. Smooth unloading can be performed.

The shield can welded part 30 includes a housing 30a, a laser irradiator 31, a movable part 33, an upper jig 35, and a circulation transfer part 37.

The housing 30a is made of a transparent material surrounding the laser irradiation part 31, the movable part 33, and the upper jig 35 to visually check the inside thereof, and includes an opening / closing door (not shown) for maintenance. .

The laser irradiator 31 irradiates the welded object with a laser generated from a laser oscillator (not shown) to weld the gasket 2 to the shield can rear portion 1.

The movable part 33 carries out the X-axis movable part 33a and Y-axis direction (weld object of a to-be-welded object) which transfers the laser irradiation part 31 in the X-axis direction (direction parallel to the conveyance direction of a to-be-welded object) on a plane according to the preset welding coordinate. And a Y-axis movable portion 33b for feeding in the direction perpendicular to the feeding direction. The movable part 33 may move the laser irradiation part 31 along the Y-axis direction in order to weld the plurality of welded objects respectively transferred by the plurality of transfer lines 11 and 13.

Referring to FIG. 5, the upper jig 35 is installed in the housing 30a in a state of being supported by a pair of predetermined frames F in the welding area. In this case, the upper jig 35 is preferably installed to be able to change the position by the usual adjustment bolt (B) in the state supported by the frame (F).

Referring to FIG. 6, the upper jig 35 has a plurality of guide holes 35a through which the laser light irradiated by the laser irradiator 31 passes. Each guide hole 35a has an irregular loop shape in consideration of a plurality of welding points of the welded object. The upper jig 35 is formed in a single unit to form two lower jigs 3, and each of the guide holes 35a is formed in consideration of welding points corresponding to the two lower jigs 3 together.

Referring to FIG. 7, the upper jig 35 is provided with a plurality of jig pin units 36 to elastically pressurize the object to be welded. Each jig pin unit 36 includes a support 36a, a contact pin 36b, and an elastic member 36c.

The support 36a is fixed to the upper jig 35 while vertically penetrating the upper jig 35. In this case, the support base 36a is mainly disposed along the periphery of the guide hole 35a, and in this case, it is preferable to consider the position where the laser beam emitted from the laser irradiator 31 does not interfere together.

The contact pin 36b is slidably installed along the longitudinal direction of the support 36a at the lower end of the support 36a (the end facing the lower jig 3). In this case, the elastic member 36c is installed inside the support 36a to elastically support the contact pin 36b.

Accordingly, when the lower jig 3 is lifted by the circulation transfer part 37 to form the upper jig 35, the contact pins 36b of the plurality of jig pin units 36 are shielded can rear part 1. By pressing the gasket 2 seated on the upper surface at a predetermined pressure, the shield can rear portion 1 and the gasket 2 can be stably supported at the same time. Since the welded object is supported in the point contact state by the plurality of jig pin units 36 as described above, the welded object avoids direct contact with the upper jig 35 and minimizes the contact area through the plurality of jig pin units 36. Can be. Therefore, it is possible to prevent the welding position of the welded object previously set in the lower jig 3 due to the pressing force applied by the plurality of jig pin units 36.

The circulation transfer part 37 is disposed at a position spaced a predetermined distance downward from the upper jig 35. The circulation transfer unit 37 transfers a plurality of shuttles 5 loaded with a pair of lower jigs 3 to the shield can welding unit 30 to a welding position, and is transferred to the shield can welding unit 30. Multiple shuttles 5 are sequentially conveyed to the welding position.

This circulation operation consists of a linear movement reciprocating in a straight line along each transfer line (11, 13) and the lifting movement to move the lower jig (3) to move to the mating position of the upper jig (35). The circulation transfer unit 37 includes a plurality of shuttles 5 and a lifter for lifting and lowering the movable members 37a and reciprocating along the transport direction of the lower jig 3. 37b).

Referring to Figure 8 describes the operation of the circulation transfer unit 37 as follows. First, when the movable member 37a is waiting at the first point P1 and detects that a plurality of shuttles 5 are moved to the upper side of the movable member 37a by a predetermined sensor (not shown), the height is set in advance. Ascending as much as the plurality of shuttle (5) is separated from the transfer line (11, 13) and at the same time loaded on the movable member (37a). Subsequently, when the movable member 37a moves to the second point P2 for welding, the lower jig lifts the plurality of shuttles 5 while the standby lifter supports both sides of the plurality of shuttles 5. (3) is moved to the position where the upper jig 35 mates.

On the other hand, the empty movable member 37a in the state in which the plurality of shuttles 5 are unloaded descends and returns to the first point P1 to load the plurality of shuttles 5 waiting for the next wait.

The circulation transfer part 37 serves to transfer the plurality of shuttles 5 sequentially to the shield can welding part 30 while repeating the above process.

1 and 2, the welding object unloading part 50 may be disposed at one side of the shield can welding part 30, and the lower jig 3 may include a plurality of welding objects to which welding is discharged from the shield can welding part 30 is completed. Take out from). The unloaded portion 50 to be welded includes a magnet picker 51 and a discharge line 53.

The magnet picker 51 can move up and down at a predetermined interval above the plurality of transfer lines 11 and 13 so as not to interfere with the transfer operation of the plurality of lower jigs 3 transferred by the plurality of transfer lines 11 and 13. At the same time, it is installed to be movable horizontally to transfer the welded object adsorbed through the magnetic force to the discharge line (53). The magnet picker 51 is a shuttle 5 for transferring a plurality of lower jigs 3 (specifically, a plurality of lower jigs 3) by sensors (not shown) installed in the plurality of transfer lines 11 and 13. ) Is detected, and the welded object to be welded is taken out from the lower jig 3.

The discharge line 53 transfers the welded object transferred by the magnet picker 51 to the discharge side. In this case, the printing unit 70 for marking is arranged around the discharge line 53 to distinguish a lot of the welded welded object.

The lower jig return unit 90 is configured to automatically circulate the lower jig 3, and includes a first elevator 91, a plurality of return lines 93 and 95, and a second elevator 97.

The first elevator 91 is arranged at the most downstream of the plurality of transfer lines 11 and 13 to define the plurality of lower jigs 3 in a state in which the to-be-welded object is drawn out through the to-be-unloaded object 50. Lower to position. The first elevator 91 rises when the plurality of lower jigs 3 are sensed by a sensor (not shown) disposed at a lowermost position of the plurality of transfer lines 11 and 13 to lower the lower jig 3. Lower after loading.

The plurality of return lines 93 and 95 are disposed at positions corresponding to the lower sides of the plurality of transfer lines 11 and 13, and the plurality of lower jigs 3 lowered by the first elevator 91 are transferred to the plurality of return lines 93 and 95. Transfer to the upstream side of the line (11, 13).

The second elevator 97 is disposed at the most upstream of the plurality of conveying lines 11 and 13 and a plurality of lower jigs 3 conveyed from the first elevator 91 by the plurality of return lines 93 and 95. To the leading end of the feed line (11, 13). The second elevator 97 includes a plurality of lower jigs 3 by a sensor (not shown) disposed at a predetermined position of the downstream of the plurality of return lines 93 and 95 (a portion adjacent to the second elevator 97). ) Is lowered and ascends after loading the lower jig (3).

As such, the lower jig return unit 90 automatically reuses the lower jig 3 by automatically returning the used lower jig 3 to the most upstream of the plurality of transfer lines 11 and 13. Accordingly, since it is not necessary to manufacture a large amount of the lower jig 3 in advance, the required amount of the lower jig 3 can be reduced.

A process of laser welding the shield can rear portion 1 and the gasket 2 through the inline welding apparatus according to the embodiment of the present invention configured as described above will be described sequentially.

First, as a pretreatment process before starting the welding operation, the control unit (not shown) generates a welding position point generated by a preset program, and sets the setting position of the upper jig 35 installed below the laser irradiation unit 31. Adjust

When the pretreatment process is completed, a pair of lower jig (3) is seated in a plurality of shuttles (5) installed in each transfer line (11, 13) and then shield can rear portion (1) and on the lower jig (3) Set the gasket (2).

Subsequently, the plurality of shuttles 5 on which the welded object is set is transferred to the shield can welding part 30 along the transfer lines 11 and 13 and then transferred to the welding position by the circulation transfer part 37.

The object to be welded is transferred to the object to be unloaded part 50 after laser welding is completed in the shield can welding part 30, and is taken out from the lower jig 3 by the magnet picker 51. The to-be-welded object to be taken out is conveyed to the product collection side by the discharge line 53. In this process, marking is performed to separate the lot of the to-be-welded object by the printing part 70.

On the other hand, the lower jig 3 in the unloaded state of the welded object is lowered by the first elevator 91 of the lower jig return unit 90 and then the conveying lines 11 and 13 by the return lines 93 and 95. It is transferred to the tip side of). Subsequently, the second elevator 97 is supplied to the uppermost ends of the transfer lines 11 and 13.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

1: Shield Can Rear Part 2: Gasket
3: lower jig 5: shuttle
11,13: transfer line 30: welded portion
31: laser irradiation part 33: movable part
35: upper jig 35a: guide hole
36: jig pin unit 36a: support
36b: contact pin 36c: elastic member
37: circulation transfer part 37a: movable member
37b: lifter 50: unloaded part
51: magnetic picker 53: discharge line
70: printing section 90: lower jig return section
91: first lift 93,95: return line
97: second lift

Claims (9)

A plurality of transfer lines for transferring a plurality of objects to be welded each of which is seated on the plurality of lower jigs;
A shield can welding unit having an upper jig corresponding to each of a plurality of lower jigs respectively transferred by the plurality of transfer lines, the shield can being disposed on the plurality of transfer lines to laser weld a plurality of objects to be welded;
A to-be-unloaded part which takes out a plurality of to-be-welded objects welded by the shield can welding part from a lower jig; And
And a lower jig return unit for returning upstream of the plurality of transfer lines to reuse the plurality of lower jigs that have passed through the object to be unloaded. The method of claim 1,
The shield can welding portion
A laser irradiator for irradiating the welded object with the laser generated from the laser oscillator; And
And a movable part for transferring the laser irradiation part in the X-axis and Y-axis directions on a plane according to a preset welding coordinate. The method of claim 2,
The shield can welding unit is arranged to circulate within the shield can welding unit, and further includes a circulation transfer unit for sequentially transferring the plurality of lower jigs transferred from the plurality of transfer lines to the welding position. . The method of claim 3,
And the upper jig includes a plurality of jig pin units through which at least one guide hole through which the laser light irradiated by the laser irradiating part passes is formed and presses the to-be-welded object resiliently. 5. The method of claim 4,
And the guide hole has an irregular loop shape including welding points of the welded object. 5. The method of claim 4,
Each of the plurality of jig pin units,
A support vertically fixed to the upper jig;
A contact pin slidably coupled to the support; And
And an elastic member installed in the support to elastically support the contact pin. The method of claim 1,
The welded object includes a gasket welded to a rear portion of the shield can and the rear portion,
The lower jig includes a recess for setting the rear portion, and an edge for supporting a rounded bent portion of the rear portion is formed along the periphery of the recess. The method of claim 1,
And a printing unit for printing a preset notation on a part of the welded object taken out from the welded object unloading unit. The method of claim 1,
Lower jig return unit
A first elevator disposed at a lowermost portion of the plurality of transfer lines to lower the plurality of lower jigs;
A plurality of return lines for conveying a plurality of lower jigs conveyed by the first elevator to an upstream side of the plurality of conveying lines; And
And a second elevator disposed at a lowermost portion of the plurality of transfer lines and configured to lift the plurality of lower jigs transferred by the plurality of return lines to the plurality of transfer lines.

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