KR102090783B1 - Length changeable type laser spot welding apparatus - Google Patents

Abstract

The tunable laser spot welding apparatus according to the present invention comprises: a body having a laser head for emitting a laser beam; A body unit connected to the main body and passing through the laser beam, and formed in a modular form for each part so that a length varies according to a focal length of the laser beam; And a holder unit connected to an end of the body unit to pass the laser beam and press and hold the object to be welded.

Description

Length variable laser spot welding device {LENGTH CHANGEABLE TYPE LASER SPOT WELDING APPARATUS}

The present invention relates to a length-variable laser spot welding apparatus, which relates to a length-variable laser spot welding apparatus for spot-welding an object to be welded with a laser beam.

Conventional resistance point welding (electrical resistance welding) is a structure in which electricity is passed through a base material between upper and lower electrodes (welding tips) by using electricity to conduct welding.

However, when the gap between the base material (iron) and the base material (iron) is widened or a gap is generated, the current does not pass and welding does not occur or the quality of welding is deteriorated.

In order to solve this problem, the conventional resistance point welding (electric resistance welding) is a structure in which the upper electrode (welding tip) is pressurized, and the bonding or welding is performed by applying electricity while pressing and attaching a base material that is open or has a gap, upper part. An electrode cylinder for elevating the upper electrode is installed and welded.

On the other hand, laser welding is a structure in which a base material is melted using a laser beam, and then the base material is melted and the molten base material, that is, a groove made of iron is filled (welded) in a manner.

However, when the gap between the base material and the base material is opened or a gap is generated in the laser welding, the welding is performed in an open state, thereby causing a problem of deteriorating the welding quality.

In order to solve this problem, laser welding is performed by sequentially installing the clamps of several clamps to close the gap between the base material and the base material by sequentially operating the closing of the installed clamps. Welding is performed on the pasted part.

In this case, in order to fill the gap of the base material, an expensive fixing device (jig) with a clamp must be installed separately.

In addition, since laser welding emits a high-intensity beam to melt the base material, when a laser beam faces a safety hazard that is harmful to the human body that becomes blind, a closed space, a safety booth is installed to solve this problem. Welding should be carried out. In this case, an expensive safety booth should be installed in accordance with international standards.

Therefore, problems such as cost increase, workability, and productivity decrease due to the installation of additional fixing devices and safety booths occur.

To solve this problem, a newly developed technique is laser spot welding that combines resistance spot welding and laser welding.

Specifically, the laser spot welding apparatus capable of performing laser spot welding is a safety booth that blocks high-intensity light emitted by a laser beam, and a holder implemented by applying a shank portion of a resistance spot welding apparatus is configured, and also a resistance The clamp arm of the clamp structure is constructed by applying the fixing jig of the spot welding device.

However, the conventional laser spot welding apparatus has a limitation in that it is impossible to deform the length according to the focal length of the laser beam due to the structural limitation of the holder, and it is difficult to maintain and repair the component when damaged.

In addition, the conventional laser spot welding apparatus has a disadvantage in that it is difficult to cleanly remove welding fumes and spatters generated during laser welding.

Republic of Korea Registered Patent Publication No. 10-0745295

The present invention was devised to solve the above problems, its length is variable, convenient maintenance and management, and its purpose is to provide a variable-length laser spot welding device that cleanly removes welding fumes and spatters.

In order to achieve the above object, a variable length laser spot welding apparatus according to an embodiment of the present invention, the main body having a laser head for emitting a laser beam; A body unit connected to the main body, through which the laser beam of the variable-length laser spot welding apparatus passes, and a body unit formed in a modular form so as to vary in length according to a focal length of the laser beam; And a holder unit connected to an end of the body unit to pass the laser beam and press and hold the object to be welded.

Here, the body unit, the body hollow through which the laser beam is formed, one end is a body member installed on the body; And a body extension member through which the laser beam passes, and at least one body extension member connected to the module from the other end of the body member.

Specifically, in the body extension member, a body extension assembly groove is formed at one end and a body extension assembly protrusion is formed at the other end so that one end is matched with the other end of the other body extension member, and the body extension assembly groove is different from the other body extension assembly groove. The body extension assembly protrusion of the body extension member may be inserted and assembled, and the body extension assembly protrusion may be inserted into and assembled into the body extension assembly groove of the other body extension member.

Further, at the other end of the body member, a body assembly protrusion that is inserted and assembled into the body extension assembly groove of the body extension member is formed, or a body assembly groove that is assembled by insertion of the body extension assembly protrusion of the body extension member is formed. Can be.

Meanwhile, the holder unit includes a holder extension member and a holder member sequentially connected from the body extension member, wherein the holder extension assembly groove is formed at one end and a holder extension assembly protrusion is formed at the other end. The holder member is formed with a holder assembly groove at one end, and the body extension assembly protrusion of the body extension member is inserted into the holder extension assembly groove, and the holder extension assembly protrusion is inserted into the holder assembly groove of the holder member. Can be assembled.

Here, at least one side of the body member and the body extension member, a forced air discharge unit connected to the air inhaler may be formed.

At this time, at least one other side of the body member and the body extension member in which the forced air discharge portion is formed, an air injection portion for spraying air toward the forced air discharge portion may be formed.

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Meanwhile, a body hole is formed in the body unit so that the laser beam passes, and a holder hole having a smaller cross-sectional area than the body hole is formed in the holder unit, and the holder unit is a holder in which a holder hollow through which the laser beam passes is formed. absence; And a holder extension member connecting the body unit and the holder member, a holder extension hollow through which the laser beam passes, and a temperature sensor inserted and installed to sense that the laser beam contacts the inner surface of the holder hole. , The holder member and the holder extension member are detachable as a module, and the holder hollow and the holder extension hollow can communicate with each other to form the holder hole.

Specifically, in the holder extension member, a holder extension cable groove in which the first cable is disposed inside is formed in a longitudinal direction on the side so that the first cable connected to the temperature sensor is not disposed outside, and the holder extension cable A sensor groove may be formed in the width direction of the holder extension member so that the temperature sensor is inserted into the groove.

In addition, the holder member is provided with a proximity sensor to detect that the end is in surface contact with the object to be welded, and the proximity sensor is installed with a proximity sensor inserted in the longitudinal direction from an end surface contacting the object to be welded, and the holder member The holder cable groove in which the second cable is disposed inside is formed so that a sensor hole in which the proximity sensor is inserted in the longitudinal direction from the end surface is formed and the second cable connected to the proximity sensor is not disposed outside. It is formed in the longitudinal direction, the holder cable groove may be connected to the holder extension cable groove.

In addition, to prevent the first cable and the second cable from being disposed outside, a body cable groove in which the first cable and the second cable are disposed therein is formed in the longitudinal direction on the side of the body member, and the body extension member In the body extension cable groove in which the first cable and the second cable are disposed therein is formed in the longitudinal direction, the holder cable groove, the holder extension cable groove, the body extension cable groove, and the body cable groove are sequentially communicated. And can be covered with a cable groove cover.

On the other hand, the holder unit, the cross-sectional shape of the holder hole is circular, it may be tapered toward the end side in contact with the object to be welded.

The length-adjustable laser spot welding apparatus according to the present invention is composed of a body unit formed in a modular shape for each part, so that the length can be easily changed according to the focal length of the laser beam, and furthermore, it is smooth and convenient for maintenance management in case of component damage. It has the effect to do.

In addition, the present invention has the advantage of being able to implement excellent welding quality by being able to cleanly remove welding fumes and spatters generated during laser welding by being configured with a forced air discharge unit together with an air injection unit.

1 is a perspective view showing a variable length laser spot welding apparatus according to the present invention.
FIG. 2 is a perspective view showing a holding portion of the tunable laser spot welding apparatus of FIG. 1.
3 is an exploded perspective view showing the holding portion of FIG. 2.
4 and 5 are longitudinal sectional views showing the holding portion of FIG. 2.
6 and 7 are views illustrating the body member of the body unit in the holding portion of FIG. 2.
8 and 9 are views showing a body extension member of the body unit in the holding portion of FIG. 2.
10 and 11 are views showing the holder member of the holder unit in the holding portion of FIG. 2.
12 and 13 are views showing the holder extension member of the holder unit in the holding portion of FIG. 2.

Hereinafter, it will be described in detail through exemplary drawings of the present invention. Note that when adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing the present invention, when it is determined that detailed descriptions of related well-known configurations or functions may obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

1 is a perspective view showing a length-adjustable laser spot welding apparatus according to the present invention, FIG. 2 is a perspective view showing a holding portion of the length-variable laser spot welding apparatus of FIG. 1, and FIG. 3 is an exploded perspective view showing the holding portion of FIG. 2, 4 and 5 are longitudinal sectional views showing the holding portion of FIG. 2.

6 and 7 are views showing the body member of the body unit in the holding portion of FIG. 2, and FIGS. 8 and 9 are views showing the body extension member of the body unit in the holding portion of FIG. 2.

Referring to the drawings, the tunable laser spot welding apparatus according to the present invention includes a main body 10, a holding portion 100.

Here, the main body 10 is provided with a laser head 14 for emitting a laser beam, specifically, the base member 11, the drive member 12 is installed, the drive member 12 is connected to the drive member ( 12) is mounted on the elevating frame (13), the elevating frame (13) is installed on the laser head (14) for firing a laser beam to be welded, fixed to the base frame (11) and supports the lower surface of the welded object A clamp arm 15 to be provided can be provided.

For reference, the laser beam emitted from the laser head 14 may be moved along a welding pattern set by adjusting a reflection angle by a reflector in the laser head 14.

In addition, the holding part 100 is connected to the main body 10 and is composed of a body unit 110 and a holder unit 120, which correspond to a clamp arm 15 on which a to-be-welded object is seated in a variable length laser spot welding device. As a part to be performed, when the object to be welded is seated and supported on the clamp arm 15, it descends to hold the object to be pressed while being pressed.

Here, the body unit 110 is connected to the main body 10, the laser beam passes therethrough, and may be formed in a modular form for each part so that the length is variable according to the focal length of the laser beam.

That is, the body unit 110 is a unit for enclosing and sealing a beam route that moves to a certain distance in order for the laser beam to be focused on the object to be welded, and the length may be varied according to the focal length of the ray point beam.

To this end, the body unit 110 forms a modular structure for each part, so that parts of each part can be easily detached from each other and at the same time, the total length of the parts can be changed according to the number of parts.

In other words, when the focal length of the ray point beam is relatively long, the body unit 110 is connected to a relatively large number of parts, and when the focal length of the laser beam is relatively short, a relatively small number of parts. As they can be connected to each other, the length can be smoothly and easily varied to correspond to the focal length of the ray point beam.

Specifically, the body unit 110 may include a body member 111 and a body extension member 112.

Here, the body member 111 is formed with a body hollow (111h) through which the laser beam passes, it is installed on the body 10 at one end.

For reference, the main body 10 is a main part in which a laser head 14 is mounted in a variable-length laser spot welding device, and includes a base frame 11, a lifting frame 13, a laser head 14, and the like. to be. At this time, the lifting frame 13 is installed to be elevated on the base frame 11, the laser head 14 is mounted on the lifting frame 13, the body member 111 is connected to the lifting frame 13 It is interlocked with the lifting movement of the lifting frame 13 to be elevated.

In addition, the body extension member 112 is in communication with the body hollow 111h of the body member 111, the body extension hollow 112h through which the laser beam passes is formed, and the other end of the body member 111 as a modular At least one or more are connected.

The number of body extension members 112 connected to the body member 111 varies depending on the focal length of the ray point beam.

That is, when the focal length of the laser beam is relatively short, one of the body extension members 112 may be connected to the body member 111, and when the focal length of the ray point beam is relatively long, a plurality of body members ( 111), the overall length of the body unit 110 may be varied according to the focal length of the laser beam.

Of course, in this case, when the focal length of the ray point beam is very short, the body unit 110 is not connected to the body extension member 112, and only the body member 111 may be connected to the body 10 and used.

Then, the assembly structure in which a plurality of bodies are assembled to each other in the body extension member 112 that implements the variable length of the body unit 110 will be described.

The body extension member 112 may have a body extension assembly groove 112b formed at one end and a body extension assembly protrusion 112a formed at the other end so that one end of the body extends with each other.

Accordingly, the body extension assembly protrusion 112a of the other body extension member 112 may be inserted and assembled into the body extension assembly groove 112b, and the body extension assembly protrusion 112a has a different body extension member 112 ) Can be assembled by being inserted into the body extension assembly groove 112b.

At this time, as the body extension member 112 takes a rectangular cylinder structure, as shown in the drawing as a preferred example for a stable and robust assembly structure, body extension assembly protrusions 112a are formed at each corner of one end. The body extension assembly groove 112b may be formed at each corner of the other end.

As described above, the body extension member 112 has a shape in which one end and the other end are matched with each other, that is, corresponding to each other, and thus, one end of the body extension member 112 has a different body extension member 112 ) Is assembled with the other end and the other end of the body extension member 112 is assembled with one end of the other body extension member 112, a plurality of body extension members 112 can be easily assembled and disassembled with respect to each other It can be used without pre- and post-separation, and it can take a convenient modular assembly structure that can be used regardless of the connection order to each other. Furthermore, due to this convenient modular desorption structure, maintenance can be efficiently performed when parts are damaged. .

For reference, it is needless to say that the plurality of body extension members 112 are firmly fastened with separate fastening members such as bolt members after being assembled to each other.

And, at the other end of the body member 111, as shown in the drawing body assembly protrusion 111a is inserted into the body extension assembly groove 112b of the body extension member 112 is assembled or formed, although the drawing Although not shown, a body assembly groove into which the body extension assembly protrusion 112a of the body extension member 112 is inserted and assembled may be formed. Accordingly, the modular body extension member 112 is also provided to the body member 111. Can be conveniently assembled and disassembled.

Further, the holder unit 120, which will be described later, includes a holder extension member 122 and a holder member 121 sequentially connected from the body extension member 112, wherein the holder extension member 122 is assembled with the holder extension at one end. A groove 122b is formed, a holder extension assembly protrusion 122a is formed at the other end, and a holder assembly groove 121a is formed at one end of the holder member 121, and the body extension is extended at the holder extension assembly groove 122b. The body extension assembly protrusion 112a of the member 112 is inserted and assembled, and the holder extension assembly protrusion 122a is inserted and assembled into the holder assembly groove 121a of the holder member 121, thereby assembling the holder unit 120. The holder extension member 122 and the holder member 121 can also be conveniently and easily assembled to the body extension member 112 of the body unit 110, and maintenance and repair are efficiently performed when parts are damaged due to such a simple detachable structure. It can be done.

Meanwhile, at least one of the body member 111 and the body extension member 112 may be formed with a forced air discharge unit 113 and an air injection unit 114.

When the laser welding of the object to be welded, welding fume and spatter are generated. At this time, the welding fume is a solid substance in which metal is dissolved and vaporized into a gaseous substance and condensed again, and the spatter is a slag that scatters during welding. I refer to metal grains.

The welding fume is contained in the air and flows into the holder unit 120 and the body unit 110, and the spatter is scattered at the welding site and flows into the holder unit 120 and the body unit 110, and the laser beam is used for this welding fume. The welding efficiency is lowered by being interfering with and dispersed by the spatter, and contaminating and damaging the expensive lens embedded in the laser head 14.

The forced air discharge unit 113 discharges the welding fume and spatter to the outside of the holder unit 120 and the body unit 110, and the air injection unit 114 discharges the welding fume and spatter forcibly. By introducing the air curtain to block the welding fume and spatter from reaching the lens of the laser head 14 at the same time as being guided to the unit 113, the welding efficiency can be increased and the lens of the laser head 14 can be protected. .

Then, first to structurally explain the forced air discharge unit 113, the forced air discharge unit 113 is formed on at least one side of the body member 111 and the body extension member 112, air It takes a structure connected with an inhaler (not shown) and a hose.

Specifically, the forced air discharge unit 113 is a body extension member 112 while sequentially passing through the holder hollow 121h of the holder member 121 and the holder extension hollow 122h of the holder extension member 122 from the welding portion ) To implement a discharge flow path for discharging the welding fume flowing into the body extension hollow 112h and the body member 111 body hollow 111h.

At this time, although the air inhaler is not shown in the drawing, it is connected to the forced air discharge unit 113 and effectively removes the welding fume on the root of the laser beam by sucking the welding fume through the forced suction method.

In addition, the air injection unit 114 is formed on the other side of at least one of the body member 111 and the body extension member 112, the forced air discharge unit 113 is formed, the air to the forced air discharge unit 113 side It is configured to spray.

In practice, the forced air discharge unit 113 may be provided on the body unit 110 independently of the air injection unit 114, but unlike this, the air injection unit 114 may be provided with the forced air discharge unit 113. ) And one set, it is preferable to allow the air injected into the body unit 110 to smoothly exit the body unit 110 through the air injection unit 114.

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On the other hand, referring to FIGS. 1 to 5 and 10 to 13 for the holder unit 120 in the holding unit 100, it will be described in detail as follows.

10 and 11 are views showing the holder member of the holder unit in the holding portion of FIG. 2, and FIGS. 12 and 13 are views showing the holder extension member of the holder unit in the holding portion of FIG. 2.

Referring to the drawing, the holder unit 120 is a portion that is connected to the end of the body unit 110 and is in contact with the object to be welded, through which the laser beam passes and has a smaller cross-sectional area than the body hole 110h of the body unit 110. The holder hole 120h is formed.

The holder unit 120 is equipped with a temperature sensor to detect that the laser beam is in contact with the inner surface of the holder hole (120h).

Specifically, the holder unit 120 may include a holder member 121 and a holder extension member 122.

Here, the holder unit 120 is formed with a holder hollow (121h) through which the laser beam passes.

In addition, the holder extension member 122 connects the body unit 110 and the holder member 121, a holder extension hollow 122h through which a laser beam passes is formed, and a temperature sensor (not shown) is inserted and installed. .

At this time, the holder member 121 and the holder extension member 122 is detached as a module, and the holder hollow 121h and the holder extension hollow 122h communicate with each other to form a holder hole 120h.

In the holder unit 120 configured as described above, a temperature sensor is installed on the holder extension member 122. When using the variable length laser spot welding device, the holder unit 120 of the holder unit 120 is used before the laser beam hits the object to be welded. In order to determine whether there is an abnormality in contact with the inner surface, it serves to measure the temperature of the holder unit 120.

Since the holder hole 120h of the holder unit 120 has a substantially smaller cross-sectional area than the body hole 110h of the body unit 110, the welding teaching position of the laser beam deviates from the size of the holder hole 120h. When the laser beam contacts the inner surface of the holder hole 120h, the laser welding is not made of a set welding pattern, and the proximity sensor mounted on the holder member 121, which will be described later, may also be damaged.

In particular, since the holder unit 120 has a circular cross-sectional shape of the holder hole 120h, the size of the holder hole 120h is smaller than that of the holder unit 120 having a conventional rectangular holder hole 120h. The possibility that the laser beam contacts the inner surface of the holder unit 120 is relatively high compared to the conventional holder unit 120.

On the other hand, the holder member 121 takes a tapered shape toward the end 121e contacting the object to be welded, and the end 121e is formed in a small size corresponding to the holder hollow 121h, thereby substantially reducing the temperature sensor. As it does not have a sufficient size to be installed, a temperature sensor is installed on the holder extension member 122.

At this time, the holder member 121 may be formed by a large temperature sensor may be installed, but if the shape processing for the installation of the temperature sensor and the proximity sensor is difficult to manufacture, the holder unit 120 is a modular structure as It is preferable to divide the holder member 121 and the holder extension member 122 and to install a temperature sensor on the holder extension member 122.

Further, in the holder unit 120, the holder hole 120h takes a circular shape, which is the most preferable circular welding pattern to maintain excellent welding stiffness in the welding pattern formed on the object to be welded by the laser beam, more preferably The purpose is to match the double circular cross-shaped welding pattern (welding pattern welded crosswise in a double circle together with double circular welding).

At this time, the holder unit 120 takes a tapered shape toward the end side in contact with the object to be welded. In particular, the non-rectangular structure, that is, the non-rectangular structure (long) in which the holder hole 120h is enlarged in cross-sectional shape at the end By taking a circular or square structure as shown in the figure differently from the formed rectangular structure, the cross-sectional area size can be significantly reduced compared to the conventional holder unit 120.

Due to this, the unnecessary portion of the holder unit 120 is eliminated, and the separation distance between the welding spots is also narrowed to maintain excellent welding stiffness, and laser spot welding is possible even in a narrow welding space. Spot welding can be possible.

Meanwhile, the holder extension member 122 in which the above-described temperature sensor is installed will be described in detail as follows.

In the holder extension member 122, a holder extension cable groove 122g in which a first cable (not shown) is disposed inside may be formed in a longitudinal direction on the side so that the first cable connected to the temperature sensor is not disposed outside. have.

In addition, a sensor groove 122s may be formed in the width direction of the holder extension member 122 so that a temperature sensor is inserted into the holder extension cable groove 122g.

Here, the holder extension cable groove 122g has a structure sequentially connected to the body extension cable groove 112g of the body extension member 112 and the body cable groove 111g of the body member 111, The first cable is extended from the holder extension cable groove (122g) to the body 10 through the body extension cable groove (112g) and the body cable groove (111g), so that the first cable is the holder extension member (122), the body As the non-deployment of the extension member 112 and the body member 111 is performed, it is possible to prevent inconvenience and inconvenience of work from interfering with other parts of the object to be welded or other devices in the vicinity during laser welding. have.

In addition, the holder extension cable grooves 122g are formed on both sides of the holder extension member 122, and the two sensor grooves 122s may be disposed symmetrically to each other with the holder extension hollow 122h interposed therebetween.

More specifically, one of the two sensor grooves 122s extends from the holder extension cable groove 122g formed on one side of the holder extension member 122 to one side of the holder extension hollow 122h, and the other one is the holder It may extend from the holder extension cable groove (122g) formed on the other side of the extension member 122 to the other side of the holder extension hollow (122h).

Accordingly, the temperature sensor is installed on one side and the other side of the holder extension member 122 on the inner surface of the holder extension hollow 122h, not only in one direction, but on any inner surface portion of the holder extension hollow 122h. Even when the laser beam is in contact, the temperature rise can be detected quickly and accurately.

In addition, an exhaust hole 122e communicating with the holder extension hollow 122h may be formed in the longitudinal direction in the holder extension member 122 so that welding fume is removed from the holder hole 120h. .

Specifically, the exhaust hole (122e) is a symmetrical structure extending from the holder extension hollow (122h) in a U-shaped to one side and an inverted U-shaped to the other side, it can be made of a deployment structure surrounding the sensor groove (122s) .

The exhaust hole 122e is formed in communication with the holder extension hollow 122h so as to remove welding fume generated during laser welding of the object to be welded from the holder hole 120h as much as possible, but as much as possible without interfering with the sensor groove 122s. It is formed while extending in the shape as described above to form the exhaust space.

Furthermore, the holder extension member 122 configured as described above has a modular structure that can be installed by changing the front-rear direction or the left-right direction.

Meanwhile, the holder member 121 may be provided with a proximity sensor to detect that the end 121e is in contact with the object to be welded.

The proximity sensor (not shown) may be installed in the longitudinal direction from the end surface 121f in contact with the object to be welded.

Preferably, the proximity sensor may be installed one at each corner, as shown in the figure, so that the end face 121f of the holder member 121 is in full surface contact with the object to be welded.

For reference, the holder member 121 may be formed with a sensor fixing hole 121b into which a fixing member (not shown) for fixing the proximity sensor, such as a bolt, is inserted into the end 121e to fix the proximity sensor. You can.

Specifically, the holder member 121 is formed so that the sensor hole 121s into which the proximity sensor is inserted in the longitudinal direction from the end face 121f is formed, and the second cable connected to the proximity sensor is not disposed outside. A holder cable groove 121g in which 2 cables (not shown) are disposed inside may be formed in the longitudinal direction on the side.

At this time, the holder cable groove (121g) takes a structure that is connected to the holder extension cable groove (122g).

The holder cable groove (121g) has a structure sequentially connected to the holder extension cable groove (122g) and the body extension cable groove (112g) of the body extension member 112, the body cable groove (111g) of the body member 111 As a result, the second cable is extended from the holder cable groove (121g) to the body (10) side through the holder extension cable groove (122g), the body extension cable groove (112g), and the body cable groove (111g), the second As the cable is not disposed outside the holder member 121, the holder extension member 122, the body extension member 112, and the body member 111, other parts of the object to be welded or other devices around the laser welding operation It can prevent inconvenience and hassle in the work that interfere with the work.

In other words, the body unit 110 includes a body member 111 and a body extension member 112 sequentially connected from the body 10, so that the first cable and the second cable are not disposed outside, the body In the member 111, a body cable groove 111g in which a first cable and a second cable are disposed therein is formed in the longitudinal direction on the side, and in the body extension member 112, a first cable and a second cable are disposed therein. Body extension cable groove (112g) to be formed in the longitudinal direction on the side.

At this time, the holder cable groove (121g), the holder extension cable groove (122g), the body extension cable groove (112g), and the body cable groove (111g) are sequentially communicated and covered with a cable groove cover (123), As the 1st cable and the 2nd cable are not arranged outside of the device, it is possible to prevent inconvenience and hassle of working.

As a result, the length-adjustable laser spot welding apparatus according to the present invention as described above, the body unit 110 is formed in a modular form by part, the length can be easily varied depending on the focal length of the laser beam, Furthermore, when parts are damaged, maintenance can be smooth and convenient.

In addition, according to the present invention, since the forced air discharge unit 113 is configured together with the air injection unit 114, it is possible to realize excellent welding quality as it can cleanly remove welding fumes and spatters generated during laser welding.

As described above, although the present invention has been described by limited embodiments and drawings, the present invention is not limited by this, and the technical idea of the present invention and the following will be described by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the equivalent scope of the claims to be described.

10: main body 11: base frame
12: driving member 13: lifting frame
14: laser head 15: clamp arm
100: holding unit
110: body unit 110h: body hole
111: body member 111h: body hollow
111a: Body assembly protrusion 111g: Body cable groove
112: body extension member 112h: body extension hollow
112a: body extension protrusion 112b: body extension groove
112g: Body extension cable groove
113: forced air discharge unit 114: air injection unit
120: holder unit 120h: holder hole
121: holder member 121h: holder hollow
121a: holder assembly groove 121g: holder cable groove
121s: sensor hole 121e: end (of the holder member)
121f: end face (of the holder member) 121b: sensor fixing hole
122: holder extension member 122h: holder extension hollow
122a: holder extension assembly protrusion 122b: holder extension assembly groove
122e: Exhaust hole 122g: Holder extension cable groove
122s: sensor groove 123: cable groove cover

Claims (13)

A body having a laser head for emitting a laser beam; A body unit connected to the main body and passing through the laser beam, and formed in a modular form for each part so that a length varies according to a focal length of the laser beam; And a holder unit connected to an end of the body unit to pass the laser beam and press and hold the object to be welded.
A body hole is formed in the body unit so that the laser beam passes, and a holder hole having a smaller cross-sectional area than the body hole is formed in the holder unit, and the holder unit includes: a holder member having a holder hollow through which the laser beam passes; And a holder extension member connecting the body unit and the holder member, a holder extension hollow through which the laser beam passes, and a temperature sensor inserted and installed to sense that the laser beam contacts the inner surface of the holder hole. , The holder member and the holder extension member is detached as a modular, the holder hollow and the holder extension hollow are in communication with each other to form the holder hole,
In the holder extension member, a holder extension cable groove in which the first cable is disposed inside is formed in a longitudinal direction on the side so that the first cable connected to the temperature sensor is not disposed outside, and the holder extension cable groove is The sensor groove is formed in the width direction of the holder extension member so that the temperature sensor is inserted,
The holder extension cable grooves are respectively formed on both sides of the holder extension member, and the two sensor grooves are disposed symmetrically to each other with the holder extension hollow therebetween,
In the holder extension member, an exhaust hole communicating with the holder extension hollow is formed in a longitudinal direction so that welding fume is removed from the holder hole, and the exhaust hole is symmetrical and extends in a U-shape from one side of the holder extension hollow to the U-shape and the other surface. A variable length laser spot welding device, which extends in an inverted U-shape to the side and is made of an arrangement structure surrounding the sensor groove.
According to claim 1,
The body unit,
A body member through which the laser beam passes is formed, and a body member having one end installed on the body; And
A body extension member through which the laser beam passes is formed, and at least one body extension member connected as a modular type from the other end of the body member;
A variable length laser spot welding device comprising a.
According to claim 2,
In the body extension member, a body extension assembly groove is formed at one end and a body extension assembly protrusion is formed at the other end so that one end is matched with the other end of the other body extension member,
The body extension assembly groove is inserted into the body extension assembly protrusion of the other body extension member is assembled, and the body extension assembly protrusion is inserted into the body extension assembly groove of the other body extension member is assembled variable length laser, Spot welding device.
According to claim 3,
At the other end of the body member, a body assembly protrusion that is inserted and assembled into the body extension assembly groove of the body extension member is formed, or a body assembly groove that is assembled by insertion of the body extension assembly protrusion of the body extension member is formed. A variable length laser spot welding device.
According to claim 3,
The holder unit includes the holder extension member and the holder member sequentially connected from the body extension member,
The holder extension member is formed with a holder extension assembly groove at one end, a holder extension assembly protrusion is formed at the other end, and the holder member is formed with a holder assembly groove at one end,
A variable length laser spot welding device characterized in that the body extension assembly protrusion of the body extension member is inserted and assembled into the holder extension assembly groove, and the holder extension assembly protrusion is inserted into and assembled into the holder assembly groove of the holder member.
According to claim 2,
The at least one side portion of the body member and the body extension member, a variable length laser spot welding device characterized in that the forced air discharge portion is formed connected to the air inhaler.
The method of claim 6,
The at least one other side of the body member and the body extension member in which the forced air discharge portion is formed, a variable length laser spot welding device characterized in that an air injection portion for spraying air to the forced air discharge portion is formed.
delete delete delete According to claim 2,
The holder member is provided with a proximity sensor so as to detect that the end is in surface contact with the object to be welded, and the proximity sensor is installed with a proximity sensor inserted longitudinally from an end surface contacting the object to be welded,
The holder member,
A sensor cable groove into which the proximity sensor is inserted in the longitudinal direction from the end surface is formed, and a holder cable groove in which the second cable is disposed inside is disposed on the side so that the second cable connected to the proximity sensor is not disposed outside. Is formed in the direction,
The variable length laser spot welding apparatus, characterized in that the holder cable groove is connected to the holder extension cable groove.
The method of claim 11,
In order to prevent the first cable and the second cable from being disposed outside, a body cable groove in which the first cable and the second cable are disposed in the body member is formed in a longitudinal direction on the side, and the body extension member has the The body extension cable groove in which the first cable and the second cable are disposed therein is formed in the longitudinal direction on the side,
The holder cable groove, the holder extension cable groove, the body extension cable groove, and the body cable groove are sequentially connected and covered with a cable groove cover, the variable length laser spot welding device.
According to claim 1,
The holder unit, the length of the laser spot welding device, characterized in that the cross section of the holder hole is circular, tapered toward the end side in contact with the object to be welded.

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